Naomi Osaka struggled to build upon an early edge in her matchup with Victoria Mboko in the 2025 Montreal Open Final.

Osaka has made progress since returning in last year's Australian Open. She won two matches in both the Australian Open and Wimbledon this year, has earned $725,727 in prize money and reached the No. 49 spot in the WTA rankings, with a higher ranking likely on the way by making the final.

Playing in her first WTA 1000 final since 2022, the Japanese made an outstanding start to the Montreal title match and took the opening set versus Canadian wildcard Victoria Mboko with a 6-2 scoreline. But then, the former world No. 1's level dropped and the 18-year-old teenage sensation went on to complete a 2-6 6-4 6-1 win.