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Novak Djokovic is the master of Melbourne. But what obstacles await him in his quest to hoist the trophy for a third straight time?

What a treat. In a match rife with momentum changes and drama, the season ended fittingly, with Novak Djokovic barely squeezing by Roger Federer.

Novak Djokovic. He's your world No. 1. Roger Federer. He's your two-time defending champ. Advantage whom at the World Tour Finals?

Novak Djokovic has had his share of troubles this season, but he's looking awfully strong in London.

Roger Federer beats David Ferrer every time they play. But at least the Spaniard can take solace in knowing he's not alone.

Every possible matchup between the big four promises to be spectacular. But which combination is the game's best rivalry?

Ho hum, another Roger Federer demolition at the World Tour Finals. What else is new?

Andy was sure dandy in London earlier this year (see his gold medal for proof). And Murray didn't start off too shabby in front of his home crowd at the World Tour Finals, either.

They've clawed their way to titles all season long. Now the best of the best duke it out at the ATP World Tour Finals.

Novak Djokovic was the undisputed winner of the Asian swing. Now, with the World Tour Finals on the horizon, Ravi Ubha sizes up the game's top eight players.

Now that the 2012 Grand Slam season is over, we can look back and realize that Serena Williams was tennis' most dominant figure, Ravi Ubha writes.

He's No. 1 and on his best surface. But can Roger Federer take care of his opponents and the pressure to land the elusive gold?

You've likely heard by now that a few eyeballs are on Andy Murray. But if he's going to win Wimbledon, he'd better play with some more pep in his step.

Novak Djokovic survived a street fight in his last match. But now Andy Murray will try and deliver the knockout punch.

Novak Djokovic experienced a letdown in his last match. Is that a sign of things to come?

Novak Djokovic looked down and out, but he showed world No. 1 resolve at the World Tour Finals.