Robredo targets Federer

Clay-court specialist Robredo, the ninth seed, set up a quarter-final with the world number one thanks to a 6-2 7-5 6-1 rout of Filippo Volandri.

"I'm playing against the best player in the world and we'll have to think about my game plan, my tactics," said Robredo. "I just want to make sure he doubts himself. I will need to pull out all the stops to achieve that objective."

Italy's Volandri, the 29th seed, had dispatched Ivan Ljubicic in the previous round, but he could not handle a red-hot Robredo in Sunday's first match on Suzanne Lenglen court.

The Spaniard has not beaten Federer in seven previous attempts, including two matches on his favoured surface.

He also lost to the Swiss in straight sets in the Australian Open earlier this year, and he admits he will have to produce his best tennis if he is to reverse the one-sided head-to-head trend.

He added: "I have to be 100% fit. I think the match will be physical and I will have to be everywhere. But first I want to enjoy what I've done."

Federer, the top seed, set up the last-eight clash with Robredo by beating Youzhny 7-6 (7/3) 6-4 6-4 on Philippe Chatrier court.

There were only two other matches played in the men's singles on Sunday, Nikolay Davydenko and Guillermo Canas emerging victorious.

Number-four seed Davydenko, who has been tipped to challenge reigning champion Rafael Nadal and Federer for the title this year, won a highly entertaining battle with David Nalbandian 6-3 7-6 (7/1) 3-6 7-6 (7/2).