Federer feels perfect again after victory.

ROGER FEDERER yesterday warned his rivals he is back to feeling "perfect" after booking his place in the quarter-finals at Wimbledon - and says he no longer panics on court.

Federer fired down 23 aces as he battled past Sweden's Robin Soderling in the fourth round in a repeat of the recent French Open final.

The five-time champion and last year-s beaten finalist won 6-4 7-6 (7/5) 7-6 (7/5).

The world number two admitted the match was little more than a "serving contest", but he was delighted to advance to the last eight and feel back to his best after being diagnosed with mononucleosis last year and later suffering a back injury.

But the 27-year-old has now overcome those problems and remains favourite to win a sixth Wimbledon title and record 15th grand slam title at the All England Club on Sunday.

Asked what he has been pleased with about his game so far, Federer said: "Just being relaxed out on court - no signs of panic that I maybe had six months ago when I played.

"I would just feel uneasy. I wouldn't be exactly sure what the right plays were. Now I feel perfect."

Soderling, who had reached the fourth round for the first time at Wimbledon, said: "At 5-4 in the last tie-break I think I played a very good point.

"I hit a great forehand on the line and he came up with a winner; there's not much you can do."

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