PARIS (Reuters) - American teenager Andy Roddick limped out of the French Open on Friday but promised he would be ready to run on to the court at Wimbledon later this month.

Roddick, limping noticeably into his post match interview, quickly downplayed the hamstring injury that occurred during the third set of his third round match with Australia's Lleyton Hewitt and confirmed he will play both Queens, which starts on June 11, and Wimbledon, starting June 25.

``I will be playing Wimbledon,'' assured Roddick. ``The plan is still to also play Queens.

``There's no serious damage. I can walk, with a little bit of a limp, I don't think it will take more than five or six days.

``There is no tear, I just strained it pretty good.''

The match was poised at one set apiece and 2-2 in the third when Roddick, previously unbeaten on clay, turned his right ankle and injured his thigh as he fell when chasing a wide ball.

Ignoring pleas from coach Tarik Benhabiles and U.S. Davis Cup captain Patrick McEnroe to retire, Roddick got up to play on but after four more points he was forced to give up.

``I'm not going to stop without trying,'' said Roddick, who overcame compatriot Michael Chang in a five-set marathon in the second round on Wednesday, during which he fought off severe cramps in his hands, calves and groin.

``I wanted to hit one last winner at Roland Garros this year. I stepped into one forehand, then got greedy and wanted another one.''

While it was a bitterly disappointing end to the French Grand Slam for the 18-year-old American, the three matches Roddick played confirmed his credentials as a future star.

Those who faced his booming serve described it as the most punishing in the game, establishing the Florida resident as a dark horse for Wimbledon where such weapons pay huge dividends.

But Roddick will arrive at the All-England Club having had little experience on grass after injuring himself in a junior Wimbledon warm-up event last year in Roehampton.

``I like the grass, it helps my serve,'' said Roddick. ``I'm very excited, I'm looking forward to it. But I've probably played less than 10 matches on grass. The last one I actually got hurt in. It wasn't serious, I just slipped little bit.