Red hot Federer rolls on, Clijsters falls in Miami

Roger Federer held off local wildcard Ryan Harrison to set up a third-round clash against twice former Sony Ericsson Open champion Andy Roddick and Serena Williams served her way into the fourth round in Miami action on Saturday.

While men's number one Novak Djokovic and women's second-ranked Maria Sharapova progressed easily, former number one and twice Miami winner Kim Clijsters was eliminated at the Premier-level event.

Clijsters fought hard and survived six match points before falling to fellow Belgian Yanina Wickmayer 6-4 7-6 in their third round clash.

"It was a special win for me today because she was one of my idols growing up," the 22-year-old Wickmayer said.

Australia's U.S. Open champion Samantha Stosur avoided an early exit by storming back after falling a set and 4-2 down to beat South African Chanelle Scheepers 2-6 7-5 6-2.

"I felt like I had to win the match like three times at the end, so I was relieved to come through," Federer told reporters after his second round tie.

"Beating an American in America is always a big deal, because this is where they usually play their very best."

Federer must next hurdle another homegrown foe in Roddick and although the Swiss world number three has mastered the American former world number one in 21 out of 23 matches, he does not expect it to be easy going.

"And if I don't play well, I know I won't win. So the pressure is there."

Roddick lost only nine points on serve and thundered down 10 aces to beat Luxembourg's Gilles Muller 6-3 6-2.

Djokovic prevailed over Marcos Baghdatis 6-4 6-4, subduing the Cypriot without the loss of a set for the first time in their last six meetings.

American Williams, the 10th seed, belted eight aces in an overpowering 6-2 6-1 rout of 21st seed Roberta Vinci of Italy.

"I played okay" said Williams. "I can definitely do better but I haven't played a lot."

Williams, whose five Miami triumphs tie her with Steffi Graf for the record, said she was still hungry for more.

"I need trophies," she said. "I want to add more and do more. There are records to break."

Second seed Sharapova advanced to the fourth round with a 6-4 6-2 win over American qualifier Sloane Stephens, while fourth-seeded Caroline Wozniacki beat Czech Petra Cetkovska 6-3 7-5.

Also coming through on Saturday was eighth-seeded Li Na of China, who won the last four games of each set to beat another Czech, Iveta Benesova, 7-5 6-2.

(Reporting By Larry Fine in New York; Editing by Nick Mulvenney)