Gabriel Diallo

Gabriel Diallo (born 24 September 2001) is a Canadian professional tennis player.

Diallo has a career-high ATP singles ranking of World No. 129, achieved on 26 February 2024. He played college tennis at the University of Kentucky.

Early life
Diallo was born in Montreal, Canada to a Guinean father and Ukrainian mother.

2022: Maiden Challenger title, ATP & top 250 debut, Davis Cup champion
In August, he made his ATP debut in the qualifying competition as a wildcard at the 2022 National Bank Open in Montreal where he defeated James Duckworth in the first round.

Participating in a tournament also with a wildcard entry, Diallo won 5 consecutive matches to claim his maiden title at the 2022 Granby Challenger in only his fourth main-draw Challenger-level tournament. The 20-year-old was the youngest Canadian champion on the Challenger Tour since Félix Auger-Aliassime won the Tashkent Challenger in 2018. As a result, he rose to a career-high No. 335 in the ATP Rankings. He finished the year at a career-high ranking of No. 224 on 21 November 2022.

2023-2024: Top 150 and Major debuts
After reaching the semifinals at the Challenger in Busan, South Korea where he lost to top seed Max Purcell, he made his top 150 debut at world No. 146 on 22 May 2023. He defeated Liam Broady and top seed Dan Evans of Great Britain at the 2023 Surbiton Trophy.

Diallo defeated again Daniel Evans to win his first ever tour level match at the 2023 National Bank Open in Toronto. He followed up his showing in Toronto by winning the doubles title at the Winnipeg Challenger, partnering Leandro Riedi.

At the Davis Cup Finals group stage, Diallo recorded a shock upset victory over world No. 18 Lorenzo Musetti, winning in straight sets to give Canada the victory over Italy.

He won his second Challenger title at the 2023 Slovak Open and reached the top 130 on 16 October 2023.

In May 2024, he qualified for his first Grand Slam at the 2024 French Open defeating two Argentines Genaro Alberto Olivieri and Marco Trungelliti, and in the third round of qualifying Alexander Ritschard.