Ana Ivanovic, the former world number one, was knocked out of the Wimbledon second round on Wednesday by Canada's Eugenie Bouchard, the reigning girls' champion.
The 12th seeded Serb, who made the Wimbledon semi-finals in 2007, was beaten 6-3, 6-3 in 63 minutes by the 19-year-old Bouchard, who is making her main draw debut at the All England Club.
Bouchard, the world number 66, faces Spanish 19th seed Carla Suarez Navarro in the third round.
The match was swiftly rescheduled for Centre Court after second seed Victoria Azarenka withdrew from the tournament just before her match against Flavia Pennetta, citing the nasty right knee injury she sustained during her first round match.
"We found out 15 minutes before going on court so I was really excited, it was crazy and great to play before this crowd," Bouchard said.
On speculation that she could be the next big thing in women's tennis, she said: "It's nice to hear those things for sure. I'm really happy to play well again here. Last year I won the juniors so it feels like my second home here, I love it here."