Jonathan Saint Georges represents France's U-17 World Cup team, ranked third globally. He specializes in doubles play. During the tournament quarter-finals against Japan, he partnered with Edgar Delacroix to face the Japanese pair Juzaburō Mōri and Renji Yanagi. The match spanned three competitive sets, concluding with Saint Georges and Delacroix defeated by scores of 5-7, 7-5, 7-5. This loss resulted in France's elimination from the competition at the quarter-final stage.