The four-time Grand Slam champion was bested by 18-year-old Victoria Mboko in Montreal after the teenager pulled off a sensational 2-6, 6-4, 6-1 comeback victory to claim her first WTA Tour title.

Victoria Mboko didn’t even have a picture on the Women’s Tennis Association (WTA) website before the Canadian Open in Montreal. Now, the 18-year-old has defeated four-time grand slam champion Naomi Osaka in the first WTA Tour final of her career.

Naomi Osaka after losing to Victoria Mboko in Montreal final “I don’t really wanna take up too much time. I’ll just say thank you to everyone. Thank you to my team, the ball kids, organizers, & volunteers. I hope you guys had a good night.” pic.twitter.com/2FG17imqmK