TENNIS in DEPTH.

Roger Federer was a straight-set quarterfinal winner Friday at the $3 million Western & Southern Financial Group Masters, a U.S. Open Series event.

The third-seeded Federer got past sixth-seeded Russian Nikolay Davydenko 6-4, 7-5 on the hardcourts at the Lindner Family Tennis Center. The Swiss native improved to 7-2 in quarterfinal matches this season and 14-2 against Davydenko.

The 16-time major titlist and former world No. 1 Federer has won three of the last five titles in Cincy (2005, 2007, 2009), including a victory over Serb Novak Djokovic in last year’s finale.

Federer’s semifinal opponent will be the winner of the evening session between Rafael Nadal and Marcos Baghdatis of Cyprus. The reigning Wimbledon and French Open champion Nadal is seeking his first trip to the final at this Cincy Masters event.

Former world No. 1 Andy Roddick and a hot Mardy Fish will meet in an all- American semifinal on Saturday.

The ninth-seeded Roddick handled Djokovic, this week’s second seed, 6-4, 7-5 on Day 6 here. The big-serving American popped eight aces and cruised in 1 hour, 23 minutes.

Djokovic broke Roddick when the American was serving for the match at 5-4 in the second set, but Roddick broke right back and then held to close out the bout.

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