DAZZLING FEDERER

Resuming the match at one-set all, Federer dazzled Monfils with an array of spine-tingling winners for a 6-3 4-6 6-4 6-1 victory that kept him on track for a record 18th grand slam title.

"I'm pumped up to be in the quarters again. It really means a lot to me," he said.

At 33, Federer would have been relieved with such a swift conclusion to the match because, thanks to Sunday's rain-curtailed programme, he will be back on court for the third day running on Tuesday for his all-Swiss quarter-final against Stan Wawrinka.

There will be two Spaniards in the men's last eight after seventh seed David Ferrer ended U.S. Open champion Marin Cilic's run with a 6-2 6-2 6-4 romp.

His next challenge will be ending the 14-match claycourt winning streak of Andy Murray after the British third seed tamed France's Jeremy Chardy 6-4 3-6 6-3 6-2.

Wimbledon winner Petra Kvitova was barely noticed as she also slipped out, beaten 2-6 6-0 6-3 by Swiss Timea Bacsinszky.

Sharapova's exit blew open the bottom half of the women's draw, where Ana Ivanovic remains as the highest seed at seven.

While Safarova produced 19 scorching forehand winners to bamboozle Sharapova, the Russian was also left to rue double faults at key moments.

She produced a pair of misfiring serves in the first set tiebreak, another double saw her go 2-0 down in the second set and a third handed Safarova match point.

"Oh my God, I cannot say how happy I am... this is amazing," Safarova said.