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The Liga 1 (English: League One), also called BRI Liga 1 due to sponsorship by Bank Rakyat Indonesia, is the highest tier of professional football in Indonesia, operating under the auspices of the PT Liga Indonesia Baru.

The competition was formed as the Indonesia Super League in 2008 to modernize the competition model into a full competition format replacing Liga Indonesia Premier Division (now Liga 2) as the top division in Indonesian football. The Liga 1 operates on a system of promotion and relegation with the Liga 2.

Forty teams have competed in the top-tier league of Indonesian professional football, which has gone through multiple rebranding. Since its inception, a total of seven teams have been crowned champions, with Persipura have won the most titles in league history, being crowned champions three times. Persipura also won the inaugural Indonesian Super League in 2009. The current brand of Liga 1 started in 2017.

Origins
Until 1979 only an amateur championship (Perserikatan) was played. After the introduction of the semi-professional Liga Sepakbola Utama (Galatama), it ran in parallel. In 1994, PSSI merged Perserikatan and Galatama to formed Liga Indonesia, integrating the fanaticism in the Perserikatan and the professionalism of Galatama with the aim of improving the quality of Indonesian football. And also marks a tiered system in Indonesian football league in the level of competition.

The format of group stage like Perserikatan, combined with a full competition system followed by the semifinal and final like Galatama, became a combination of Liga Indonesia competition formats.

In 1994, PSSI merged teams from Perserikatan, which was a popular league for amateur clubs representing regional football associations, and Galatama, which was a less popular league made up of semi-professional teams, to form Liga Indonesia, integrating the fanaticism in the Perserikatan and the professionalism of Galatama with the aim of improving the quality of Indonesian football. This effort ushered in a tiered system in the Indonesian competitive football scene. The group stage format, whch was used in Perserikatan, was combined with a full competition system followed by semifinal and final rounds like Galatama.

Foundation
Modern competition era started. In 2008, PSSI organize Indonesia Super League as the new professional football league in Indonesia, replacing Indonesia Premier Division as top-tier competition in Indonesia. Indonesia Super League which puts full competition format, became a new thing for Indonesian football. If previously Indonesian football was identical to the tournament competition format, now the competition champion was generated from the points obtained in the competition.

The league held its first season in 2008–09. It was composed of 18 clubs for that season. The 18 inaugural members of the new Indonesia Super League were: Originally, Persiter and Persmin were qualified as top nine in east region 2007–08 Liga Indonesia Premier Division. But they failed the verification to be inaugural members of the Indonesia Super League and their positions were replaced by PSIS and PKT. The first Indonesia Super League goal was scored by Ernest Jeremiah of Persipura in a 2–2 draw against Sriwijaya.

Modern competition era started in 2008 with the 2008-09 Indonesia Super League. The first season had 18 clubs. The first Indonesia Super League goal was scored by Ernest Jeremiah of Persipura in a 2–2 draw against Sriwijaya F.C.. The 18 inaugural members of the new Indonesia Super League were Persipura, Persiwa, Persib, Persik, Sriwijaya, Persela, Persija, PSM, Pelita Jaya, Arema, Persijap, Persiba, PKT Bontang, Persitara, PSMS, Deltras, Persita, and PSIS. Originally, Persiter and Persmin were qualified to register but they failed the verification requirements to be inaugural members of the Indonesia Super League.

Dualism era
In 2011, a rebel league, Liga Primer Indonesia was formed. The league was managed by Konsorsium Liga Premier Indonesia and PT Liga Primer Indonesia that was not recognized by the PSSI. PSM, Persema, and Persibo joined as defectors from Indonesia Super League. That competition was then stopped during the half-season break.

After the inauguration of the new PSSI board, member of Executive Committee and Chairman of the Competition Committee of PSSI, Sihar Sitorus, appointed PT Liga Prima Indonesia Sportindo as new league operator replacing PT Liga Indonesia because the latter didn't provide an accountability report to the PSSI and announced Indonesia Premier League as the new top level competition in Indonesia.

But the problem arose when Sihar Sitorus said the competition would be divided into two regions and there would be an addition of six clubs in the top division which caused many members to be dissatisfied with it. Therefore, there were defections of 14 Indonesia Premier League contestants to Indonesia Super League. 2011–12 Indonesia Super League keep rolling as illegal competition that is not recognized by FIFA and AFC.

In PSSI Extraordinary Congress on 17 March 2013, it was decided that Indonesia Super League would once again emerge as the top level competition as an unification league following the disbandment of the Indonesian Premier League after finishing the 2013 season by holding the play-offs. The best seven teams followed the verification to be in the unified league, but only Semen Padang, Persiba Bantul, Persijap, and PSM that passed the verification while Perseman, Persepar, and Pro Duta failed, making 2014 season followed by 22 teams.

As the football scene in Indonesia is heavily politicized with rival factions upending each other, conflict was the norm before the 2017 Liga 1 competition started. The worst conflict occurred in 2011. After the inauguration of the new PSSI board in 2011, a member of PSSI's Executive Committee and chairman of its Competition Committee, Sihar Sitorus, appointed PT Liga Prima Indonesia Sportindo as the new league operator replacing PT Liga Indonesia because the latter failed to provide an accountability report to the PSSI. Sitorus, one of many politicians in the PSSI, announced the Indonesia Premier League as the new top-level competition in Indonesia. Upon the emergence of IPL, PSSI did not recognize the validity of ISL. ISL regulars PSM, Persema, and Persibo, which had boycotted the ISL operators due to referee and management decisions, gladly defected to join IPL along with splinters of existing ISL teams. However, the 2011 IPL season was stopped half-season, due to the rise of a rebel PSSI faction. IPL restarted in late 2011 for the 2011-12 season.

Before the schism of PSSI, Sitorus triggered more controversy when he said the new competition would be divided into two regions and there would be an addition of six clubs in the top division, which angered many association members. Thus, 14 teams that supposed to be Indonesia Premier League contestants chose to support the Indonesia Super League that continued to roll under the support of the PSSI rebel faction despite being labeled as an illegal competition. The official PSSI, supported by FIFA and AFC, did not recognize the ISL for two seasons. In the meantime, the Indonesian Premier League became the top-tier league from 2011 to 2013 with only 11 teams.

In PSSI's extraordinary congress on 17 March 2013, association members attacked the moves from Sitorus and decided that the Indonesia Super League would once again emerge as the top-level competition, following the disbandment of the Indonesian Premier League. Sihar and five other PSSi board members received punishments of non-involvement in football matters for creating the dualism that disrupted the running of competitions.

The new PSSI board also decided that the best seven teams of the 2013 Indonesian Premier League, following verification, could join the unified league. However, only Semen Padang, Persiba Bantul, Persijap, and PSM passed while Perseman, Persepar, and Pro Duta failed, making the 2014 season followed by 22 teams.

Government intervention and FIFA suspension
The impact of dualism haunted Indonesian football years after consolidation. On 18 April 2015, Minister of Youth and Sports Affairs Imam Nahrawi officially banned the activities of PSSI after PSSI refused to recognize the recommendations from the Indonesian Professional Sports Agency (BOPI), an agency under the ministry, that Arema Cronus and Persebaya should not pass ISL verification because there were still other clubs using the same name. Previously, Nahrawi had sent three letters of reprimand. However, PSSI refused to answer his call until a predetermined deadline. It made PSSI officially stop all competitions in 2015 season after PSSI's Executive Committee meeting on 2 May 2015 called the government intervention as a force majeure.

The government intervention also led FIFA to punish Indonesia with a one-year suspension of all association football activities as the world body considers overbearing state involvement in footballing matters as a violation against its member PSSI. During the suspension, some tournaments were made to fill the vacuum, starting with the Indonesia President's Cup 2015, in which Persib came out as champions, until the Bhayangkara Cup closed the series of unrecognized tournaments.

A long-term tournament with full competition format, Indonesia Soccer Championship, emerged short after. Along the way, exactly on 13 May 2016, FIFA officially revoked the suspension, following the revocation of the Indonesian ministerial decision on 10 May 2016. The 2016 season continued as an unofficial competition and Persipura taking the title.

Rebranded
In 2017, the competition was rebranded under a new official name, Liga 1. The name changes also applied to Premier Division (became Liga 2) and Liga Nusantara (became Liga 3). The competition operator was also changed from PT Liga Indonesia (LI) to PT Liga Indonesia Baru (LIB). Bhayangkara is the first champion of the competition under the new name, which they won due to head-to-head advantage against Bali United after both teams had the same points at the end of the season.

Competition
Currently there are 18 teams in Liga 1. During the course of a season each team plays the others twice (a double round-robin system), once at their home stadium and once at that of their opponents', for 34 games. Teams receive three points for a win and one point for a draw. No points are awarded for a loss. Teams are ranked by total points, then head-to-head records, then goal difference, and then goals scored. If still equal, a drawing held to determine which teams is above the other.

The changes in the number of teams over the years are as follows:

Promotion and relegation
A system of promotion and relegation exists between Liga 1 and Liga 2. The three lowest placed teams in Liga 1 are relegated to Liga 2, and the top two teams from Liga 2 promoted to the Liga 1, with an additional team promoted after a third place play-off involving the losers of Liga 2 semifinals.

Past winners
Notes:
 * Name of teams at that season. A number of team name were changed later.

Teams

 * For more details see List of football clubs in Indonesia

A total of 40 teams have played in the league from its inception in 2008 up to and including the 2021 season.

Current teams
The following 18 teams will be competing in the Liga 1 during the 2021 season. Notes:
 * "Number of seasons" counted as of the start of the 2021 season.

Former teams
The following teams will not be competing in the Liga 1 during the 2021 season, but have previously competed in the Liga 1 for at least one season.

Foreign players
Foreign players policy has changed multiple times since the league inception.
 * 2008–2011: 5 foreign players including 2 Asian quota.
 * 2011–2012: 4 foreign players including 1 Asian quota.
 * 2013: 5 foreign players including 2 Asian quota.
 * 2014: 4 foreign players including 1 Asian quota and only 3 can be on the field at a time.
 * 2015: 3 foreign players. All 3 players can be on the field.
 * 2017: 4 foreign players including 1 Asian quota and 1 marquee player quota. All 4 players can be on the field.
 * 2018–present: 4 foreign players including 1 Asian quota. All 4 players can be on the field.

Awards
Notes:
 * Nationality of players at presentation of award. A number of foreign players were naturalized to play for Indonesia later in their career.
 * Name of teams at presentation of award. A number of team name were changed later.

Best goals

 * The score at the time of the goal. Player's team's score listed first.
 * Italics indicates the home team.

Liga 1 clubs in Asia
Traditionally, Liga 1 clubs have done particularly well in the AFC Cup. Persipura (2011), Arema (2012), and Semen Padang (2013) managed to reach the quarter-finals of the AFC Cup before being knocked-out by Arbil (Iraq), Al-Ettifaq (Saudi Arabia), and East Bengal (India) respectively. Persipura is the only Liga 1 club to reach the AFC Cup semi-finals in 2014 but lost to eventual winner Al-Qadsia of Kuwait. Persija in 2018 and PSM in 2019 were the only two teams manage to reach ASEAN Zonal semi-finals so far in the new format of AFC Cup introduced in 2017.

In the AFC Champions League however, no Liga 1 club has ever managed to make it past the group stage.

AFC Champions League
Name of teams at participation. A number of team name were changed later.

AFC Cup
Name of teams at participation. A number of team name were changed later.

Sponsorship naming
The Liga 1 has had several denominations through the years due to its sponsorship:
 * 2008–2011: Djarum Indonesia Super League
 * 2011–2012: Indonesian Premier League
 * 2013–2014: Indonesia Super League
 * 2015: QNB League
 * 2017: Gojek Traveloka Liga 1
 * 2018: Gojek Liga 1
 * 2019–2020: Shopee Liga 1
 * 2021–: BRI Liga 1