Serena Williams was bundled out of the Australian Open on Monday, losing her fourth-round match to Russian world number 56 Ekaterina Makarova 6-2, 6-3 on a scorching day at Rod Laver Arena.
The 13-times grand slam champion was a picture of torment throughout, serving up seven double-faults and spraying 37 unforced errors to lose the match in 82 minutes.
Williams saved three match points on serve, but pushed a backhand wide on the fourth to end the American's bid for a sixth title at Melbourne Park.
"I don't know what to say, it's an amazing feeling," Makarova said in a courtside interview.
"I'm really happy that I finsihed in my way ... It's an unbelievable feeling I don't know what to say."
Makarova's win snapped a 17-match winning streak at Melbourne Park for Williams, who won the 2009-10 titles, but missed last year's tournament due to injury.
Williams's last defeat at the Australian Open was by Jelena Jankovic, who beat her in the quarter-finals in 2008.
The win secured the Russian her first grand slam quarter-final, where she will face either compatriot Maria Sharapova or Germany's Sabine Lisicki, who play in the evening match.