British number one Laura Robson went out of the French Open in the first round with a wayward performance against 10th seed Caroline Wozniacki.
Robson, ranked 35th in the world, lost 6-3 6-2 in one hour and 11 minutes on Court Suzanne Lenglen.
The Briton, 19, was widely tipped to cause an upset against the out-of-form Wozniacki, but the Dane was much the steadier.
Robson's attacking style was always likely to be more high-risk, but she paid for 39 unforced errors and double-faults at key times, at one stage shouting, "You're playing into her hands!"
"I think Caroline played really well and I thought she played smart," Robson said afterwards.
"She definitely knew what she wanted to do on the court, and generally I just wasn't able to get into the match. My shots just weren't firing as well as they usually are, so it's disappointing."
Wozniacki, 22, had lost her previous five matches and did not exactly start in confident mood, but she was twice handed breaks with Robson double-faults.
The teenager had failed to capitalise on early break points of her own and Wozniacki grew in confidence, moving Robson around and exposing her footwork on the clay.
A brilliant lob followed by a backhand drive-volley gave Wozniacki a break early in the second set, and when Robson's faltering backhand found the tramlines to see her fall 4-1 behind, the task was becoming too great.
One thumping forehand earned the Briton a break back, but Wozniacki reeled off the final two games to seal a confidence-boosting win and leave Robson with only the doubles to play for in Paris.
The result leaves British hopes in the singles resting on Heather Watson and Elena Baltacha, who play their first-round matches on Tuesday.
And when it was suggested that Andy Murray's absence through injury had focused more attention on her, Robson joked: "Really? I hadn't noticed."
She added: "It's been interesting. There's definitely been a fair few more people at the practices the last couple of days, but I've just tried to get on with it really and now you guys can watch Heather and Bally [Baltacha]."
Robson, who split with coach Zeljko Krajan earlier this month, also confirmed that she will wait until after Wimbledon to find a replacement.
Wozniacki is also reportedly on the hunt for a new coach after her father Piotr said he would be stepping back from the role, and she admitted it can be hard to find the right person.
"It's very difficult to find someone who works great with me or with Laura or with someone who knows what they want out there," said Wozniacki.
"Because we know what we want. We know we can improve all the time and play better.
"I think it's difficult to find someone who doesn't want to just go in and try to control everything."