Geoffrey Blancaneaux (born 8 August 1998) is a French professional tennis player who competes on the ATP Challenger Tour. He has a career-high ATP singles ranking of World No. 134 achieved on 14 November 2022 and a doubles ranking of No. 115 achieved on 19 May 2025.
Blancaneaux won the 2016 French Open boys' singles title, defeating Félix Auger-Aliassime in the final after saving three championship points.
In September 2017, Blancaneaux made his Grand Slam debut, after receiving a wildcard to enter the main draw at the US Open.
In December 2021, Blancaneaux won his maiden Challenger singles tournament at the Maia Challenger, defeating Tseng Chun-hsin in the finals.
Seeded No. 190 at the 2022 French Open he qualified to make his Grand Slam debut at this Major on his sixth attempt. He reached the top 150 on 8 August 2022.
In October, Blancaneaux made his Masters debut, after receiving a wildcard to enter the qualifying draw at the 2022 Rolex Paris Masters. As a result, he reached a new career high ranking of No. 134 on 14 November 2022.
In May 2023, Blancaneaux reached his second final on the ATP Challenger Tour at the Tunis Open, losing to Sho Shimabukuro in the final.
In February 2024, Blancaneaux won his second Challenger title at the Delhi Open, defeating Coleman Wong in the final.
In February, Blancaneaux won his third Challenger title at the Brazzaville Challenger, defeating fellow countryman Calvin Hemery in the final. He also reached the final in the doubles tournament, partnering with Maxime Chazal, but lost in the final to top seeds Mateo Barreiros Reyes and Paulo Andre Saraiva Dos Santos. Blancaneaux reached three consecutive Challenger doubles finals by also reaching the final at the Rwanda Challenger and Rwanda Challenger II, both times partnering with ZdenÃÂk Koláà Â.