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You might not be overly familiar with Janko Tipsarevic, but he certainly adds intrigue to the World Tour Finals.

Andy Murray reverted to the petulant lad he can be when things go awry. And things were going awry at the World Tour Finals.

Roger Federer ran through the Paris Masters field and, in doing so, looked like the Roger Federer of old. We've heard that story before.

Roger Federer has played flawlessly and is his service hasn't looked this good in years, but Jo-Wilfried Tsonga will have destiny and the hometown behind him Sunday in the final of the Paris Masters, Ravi Ubha writes.

Novak. Roger. Rafa. There was no dearth of Grand Slam electricity this year. But only one match yielded record-breaking Down Under drama.

Roger Federer showed he can compete against Rafael Nadal on clay, but it's still not good enough.

Yes, Roger Federer dug himself out of a hole in Madrid against Feliciano Lopez. But don't panic. Save that for the Slams.

Perhaps clay is exactly what the doctor ordered for Roger Federer, who zipped through his Monte Carlo opener.

No one will deny that Kim Clijsters was the player to beat -- that is until the injury bug hit. And now that the grueling clay season is here, she better heal up nicely.

Among the five most pressing questions heading into the 2011 Australian Open: How will Rafael Nadal's finicky knees hold up after his curiously curtailed offseason?

With respect to all the Federer drama and Nadal heroics in 2010, this really long match stole the spotlight.

Who was the star of the show in tennis in 2010? Rafael Nadal, without a doubt. Entering the season under a cloud of uncertainty, Nadal achieved one of the finest years in the history of the sport. He reclaimed the No. 1 ranking and completed his Gra...

Roger Federer made a statement from the opening game of the year-end championships and never looked back.

Rafael Nadal's recovery powers will be tested against Roger Federer at the year-end championships dream finale.

Brace yourself for a riveting end to the year-end championships. Rafael Nadal, Roger Federer, Novak Djokovic and Andy Murray reached the London semis. So who will emerge victorious?

Despite an anticlimactic London clash, there's something special about the Rafael Nadal-Novak Djokovic rivalry. And we should all be paying attention.