At Indian Wells, it's back to serious business for Stan Wawrinka and the Big Four.
After a fun time at MSG, Novak Djokovic and Andy Murray look to regain their top form.
It's too early to make any absolutes, but Stan Wawrinka looks like he could be the leader of a new landscape in men's tennis.
Ultra-competitive wouldn't come close to describing last year's Novak Djokovic-Stanislas Wawrinka battles.
It's only fitting that Novak Djokovic capped a spectacular two months with the year-end championship.
Four years ago, it was Juan Martin del Potro who got the best out of Roger Federer. Even though the protagonists were the same, history wasn't about to repeat itself, Greg Garber writes.
Rafael Nadal could have mailed it in Friday, but he didn't. No one was happier than Stanislas Wawrinka.
This one did not come easily for Novak Djokovic, but he overcame a game Juan Martin del Potro in London.
Novak Djokovic played the match of the day, but it was Rafael Nadal who closed in on history.
The ATP World Tour Finals is not only a punctuation to this season, but a prelude to 2014.
Rafael Nadal is the new No. 1, but Novak Djokovic got the last laugh. Who says fall tennis isn't good?
This was a comeback that was astonishing by even Rafael Nadal's own absurdly high standards.
Love him or hate him, Rafael Nadal is the hottest player in the land.
It's easy to take Novak Djokovic's sustained excellence for granted -- but urge you not to.
Novak Djokovic and Andy Murray each won -- but not without some difficulties.
Raise your hand if you thought Rafael Nadal could make this kind of comeback? If you did, we don't believe you.