Smilla Sundell

Smilla Sundell (born 12 November 2004) is a Swedish Muay Thai kickboxer. She is currently signed to ONE Championship, where she was the former ONE Women's Strawweight Muay Thai World Champion.

On April 22, 2022, Sundell became the youngest person to ever win a world title in Muay Thai by defeating Jackie Buntan to win the inaugural ONE Women's Strawweight Championship at 17 years and 5 months. As of April 2024, she is ranked as the number two female featherweight (57.153 kg) Muay Thai contender in the world by the WBC Muaythai.

Early life
Born in Sundbyberg, Sweden, Sundell started practicing karate at five years old for self-defense. She first tried her hand at Muay Thai at 10 or 11, while on vacation in Thailand. Sundell and her family moved to Ko Samui when she was 12 years old due to her parents' careers. She and her younger sister started practicing Muay Thai at a gym called Yodyut Muay Thai due to a lack of any other sports. When Sundell was 15, her family moved back to Sweden. But she stayed in Thailand to pursue Muay Thai. Running out of opponents in Ko Samui and inspired by watching Stamp Fairtex, in October 2019 she moved to Pattaya and joined the Fairtex Gym, where she currently lives by herself.

Early career
In early 2021, Sundell was ranked the number one female featherweight (57.153 kg) Muay Thai practitioner in the world by the WBC Muaythai at 16 years of age. She has notable victories over decorated champion Sawsing Sor Sopit, Ponpan Por.Muengpetch, and male fighter Bongsak Sitpholek. After amassing a record of 31 wins, 5 losses and 1 draw, Sundell signed with ONE Championship in 2021.

ONE Championship
In her ONE Championship debut at ONE: Full Circle on 25 February 2022, Sundell faced Australia's Diandra Martin. She won the fight by TKO in round 3. This was her first fight in four-ounce MMA gloves, which are smaller than the usual gloves used in Muay Thai.

ONE Women's Strawweight Muay Thai World Champion
Sundell faced Jackie Buntan for the inaugural ONE Women's Strawweight Muay Thai World Championship at ONE 156 on 22 April 2022. Sundell won by unanimous decision, making her the youngest person to ever win a world title. The fight also earned her a $50,000 Performance of the Night bonus.

Sundell made her kickboxing debut against Milana Bjelogrlić at ONE Friday Fights 18 on May 26, 2023. She won the fight by unanimous decision.

Sundell made her first Women's Muay Thai Strawweight World title defense against ONE Women's Atomweight Muay Thai World Champion Allycia Rodrigues at ONE Fight Night 14 on September 29, 2023. She retained the championship by a third-round technical knockout. She also earned her second $50,000 Performance of the Night bonus.

In the second title defense, Sundell faced Natalia Diachkova on May 4, 2024, at ONE Fight Night 22. At the weigh-ins, Sundell came in at 126.5 lb (after coming in at 127.7 lb in for an unofficial check two and a half hours into the weigh-ins), 1.5 pounds over the strawweight limit for a title fight. As a result, Sundell was stripped of the title and only Diachkova was eligible to win it. She won the fight via technical knockout in the second round.

Championships and awards

 * ONE Championship
 * ONE Women's Strawweight Muay Thai World Championship (One time; former)
 * Youngest person to win a world title in ONE history
 * One successful title defense
 * ONE Super Series Female Fighter of the Year 2022
 * Performance of the Night (Two times) vs. Jackie Buntan and Allycia Rodrigues

Fight record
! style=background:white colspan=9 |Sundell missed weight (126.5 lb) and was stripped of the ONE Women's Strawweight Muay Thai World Championship. Only Diachkova was eligible to win the title. ! style=background:white colspan=9 |Defended the ONE Women's Strawweight Muay Thai World Championship. ! style=background:white colspan=9 |Won ONE Women's Strawweight Muay Thai World Championship.
 * - style="background:#cfc;"
 * 2024-05-04|| Win ||align=left|🇷🇺 Natalia Diachkova || ONE Fight Night 22||Bangkok, Thailand || TKO (knees and punches to the body) || 2 || 2:59 ||
 * - style="background:#cfc;"
 * 2023-09-29 || Win ||align=left|🇧🇷 Allycia Rodrigues || ONE Fight Night 14 || Kallang, Singapore || TKO (punches and elbows) || 3 || 2:58 ||
 * - style="background:#cfc;"
 * 2023-05-26 || Win ||align=left|🇷🇸 Milana Bjelogrlić || ONE Friday Fights 18 || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00 || Kickboxing match
 * - style="background:#cfc;"
 * 2022-04-22 || Win ||align=left|🇺🇸 Jackie Buntan || ONE 156 || Kallang, Singapore || Decision (Unanimous) || 5 || 3:00 ||
 * - style="background:#cfc;"
 * 2022-02-25 || Win ||align=left|🇦🇺 Diandra Martin || ONE: Full Circle || Kallang, Singapore || TKO (3 Knockdowns)|| 3 || 1:35 ||


 * - style="background:#c5d2ea;"
 * 2020-12-13 || Draw ||align=left|🇹🇭 Fahseethong Sitzoraueng || Super Champ Muay Thai || Bangkok, Thailand || Decision || 3 || 3:00 ||


 * - style="background:#cfc;"
 * 2020-10-23 || Win ||align=left|🇹🇭 Sawsing Sor Sopit || Super Champ Muay Thai || Bangkok, Thailand || Decision || 3 || 3:00 ||


 * - style="background:#cfc;"
 * 2020-09-06 || Win ||align=left|🇹🇭 Ponpan Por.Muengpetch || Super Champ Muay Thai || Bangkok, Thailand || KO (Knee to the head)|| 2 || 2:07 ||

! style=background:white colspan=9 |For the WPMF World 115 lbs title.
 * - style="background:#cfc;"
 * 2020-02-29 || Win ||align=left|🇦🇺 Nicola Callander || Rogue Muay Thai || Eatons Hill, Queensland, Australia || Decision (Unanimous)|| 5 || 2:00 ||
 * - style="background:#cfc;"
 * 2019-11-28 || Win ||align=left|🇹🇭 Gulapthip AyonGym || JF Stadium || Pattaya, Thailand || Decision (Unanimous)|| 5 || ||
 * - style="background:#cfc;"
 * 2019-09-19 || Win ||align=left|🇹🇭 Nongjoy Sor.Kanjana || Chaweng Stadium || Koh Samui, Thailand || TKO (Knees)|| 3 || ||
 * - style="background:#cfc;"
 * 2019-07-26 || Win ||align=left|🇹🇭 Payakesan || Chaweng Stadium || Koh Samui, Thailand || TKO|| 2 || ||
 * - style="background:#cfc;"
 * 2019-05-24 || Win ||align=left| 🇪🇪 Calista Parts || Bangla Stadium|| Phuket, Thailand || Decision || 5 || 2:00 ||
 * - style="background:#fbb;"
 * 2019-03-16 || Loss ||align=left| 🇹🇭 Nongbew Thepsutin|| || Ayutthaya, Thailand || Decision (Unanimous)|| 5 || 3:00 ||
 * - style="background:#cfc;"
 * 2019-05-24 || Win ||align=left| 🇪🇪 Calista Parts || Bangla Stadium|| Phuket, Thailand || Decision || 5 || 2:00 ||
 * - style="background:#fbb;"
 * 2019-03-16 || Loss ||align=left| 🇹🇭 Nongbew Thepsutin|| || Ayutthaya, Thailand || Decision (Unanimous)|| 5 || 3:00 ||
 * 2019-03-16 || Loss ||align=left| 🇹🇭 Nongbew Thepsutin|| || Ayutthaya, Thailand || Decision (Unanimous)|| 5 || 3:00 ||


 * - style="background:#cfc;"
 * 2019-02-03 || Win ||align=left| 🇺🇸 Justine || Samui International Stadium|| Ko Samui, Thailand || TKO|| 3 || ||


 * - style="background:#cfc;"
 * 2018-12-20 || Win ||align=left| || Samui International Stadium || Ko Samui, Thailand || TKO (Knees)|| 3 || ||


 * - bgcolor="#cfc"
 * 2018-12-07 || Win ||align=left|🇹🇭 || International Muay Kastsart University || Bangkok, Thailand || TKO || 1 || ||
 * colspan=9 | Legend:
 * colspan=9 | Legend: