Gilles Simon has described Roger Federer as "difficult to face" ahead of their quarter-final match at Wimbledon.
The Frenchman beat sixth seed Tomas Berdych to reach the last eight, where he will face the seven-time champion, who has dropped just one set in his first four matches.
The world number 13 told reporters: "We have never played on grass. I think he's playing really good right now. Today he was in really good shape. I would just go there and try to play what I'm playing from the beginning of the tournament and from the beginning of the grass court season.
"We often had some close matches with Roger. Still he destroy me once, so I'm ready that it can be sometimes difficult to face him, but one more time I just feel good and I just want to play it."
The men's quarter-finals take place tomorrow.
