Serena Williams vowed to “work five times as hard to make sure I never lose again” after crashing out in the second round of the French Open.
The tournament had previously lost Australian Open champions Stan Wawrinka and Li Na but Williams’s 6-2 6-2 defeat by Spain’s Garbine Muguruza was on another level.
The world No 1 went into the tournament as a huge favourite to retain the title she won for the second time 12 months ago.
But, within an hour of her sister Venus losing to Anna Schmiedlova, Serena trudged off the court a beaten woman. The pair had been expected to meet in the third round.
The result was surprising enough but the manner of it added to the shock. The 32-year-old had never previously won fewer than five games in any grand slam match.
Meanwhile, coupled with Li’s loss to Kristina Mladenovic on Tuesday, it is the first time in the Open era that the top two seeds in the women’s tournament have lost before the third round at any grand slam.
Williams, who made 29 unforced errors and hit only eight winners, said: “I don’t think anything worked for me today. It was one of those days. You can’t be on every day, and, gosh, I hate to be off during a grand slam. It happens. It’s not the end of the world.
“I think she played really well and she played really smart. It’s great because I’m going to go home and work five times as hard to make sure I never lose again.”
Maria Sharapova is the new women’s favourite after victory over Tsvetana Pironkova.
She ground out a 7-5 6-2 victory to set up an intriguing third-round clash with Sam Stosur.
Novak Djokovic and Roger Federer showed the tennis world has not completely spun off its axis by moving smoothly into the third round.
Federer followed Williams onto Court Suzanne Lenglen, and he did not have things all his own way against qualifier Diego Sebastian Schwartzman but was comfortable enough in a 6-3 6-4 6-4 victory.
Djokovic had the upper hand in every area of his match against Frenchman Jeremy Chardy as he eased to a 6-1 6-4 6-2 victory.
Today, Andy Murray faces Marinko Matosevic for a place in the third round.
Also in second-round action will be Heather Watson, who faces a very tough task against fourth seed Simona Halep.