By Piers Newbery BBC Sport at Wimbledon

In the third set I lost it a little bit and I apologise for my language Greg Rusedski Roddick ends Rusedski's dream

Greg Rusedski has apologised for his foul-mouthed tirade during a second-round defeat to Andy Roddick at Wimbledon.

The Briton unleashed a torrent of expletives at the umpire after a spectator called "Out" during a rally towards the end of the third and final set.

At a post-match news conference, the 29-year-old left-hander admitted his outburst was over-the-top.

"In the third set I lost it a little bit and I apologise for my language," he said.

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"It wasn't necessary but these things happen.

"I'm disappointed in myself. I've only got myself to blame and there's no way I should have done that.

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"What you can't control you've just got to let go sometimes, and I couldn't do that."

Rusedski now faces a fine, the size of which will depend on a chat between him and chief referee Alan Mills on Thursday, but which may be as much as $10,000 (�7,000).

Photos of Rusedski's angry loss

"I guess I'll get fined now but there's nothing much I can do about it," he said.

The incident that so incensed Rusedski came with Roddick serving at 30-15 in the ninth game of the third set.

As the American floated a backhand down the court, a fan called "Out" from the crowd and Rusedski stopped playing the point.

The umpire subsequently gave the point to Roddick and refused to allow a let for the interjection from the crowd.

I knew he might be a little mad and if I was going to take over that would probably be my time Andy Roddick

"I thought it was the line judge," said Rusedski. "That's why I stopped playing. It's my mistake and that's it."

The Briton readily admitted he had lost to the better player, saying: "Credit to him, he played well and deserved to win today. He's a great player."

Roddick admitted that he was "pretty lucky" to get the point that so incensed Rusedski but felt that it was "the right call".

And as someone who has had his fair share of on-court tantrums, the 20-year-old was happy to be the calmest person on Centre Court.

Academy: How to keep your cool

"I can relate to Greg in that sense but I was just trying to keep it on my side of the court," he said.

"I knew he might be a little mad and if I was going to take over that would probably be my time."

Roddick hailed the influence of new coach Brad Gilbert on his game following his win over Rusedski.

"The results are speaking right now but a lot of it is in between the ears, just keeping calm," said the American.

"We have a pretty relaxed atmosphere, we have a lot of fun.

"It's something new, something exciting, so I'm just trying to go with that now."