John Isner has been one of the game's most consistent players. But perhaps that's been his biggest problem all along.
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.
A year ago, Rafael Nadal couldn't fathom finishing 2013 as the top player in the land. But here he is -- the top player in the land.
Novak Djokovic played the match of the day, but it was Rafael Nadal who closed in on history.
Stanislas Wawrinka waited a long time to get here, but patience and persistence paid off for him in his ATP World Tour Finals debut.
The ATP World Tour Finals is not only a punctuation to this season, but a prelude to 2014.
When you think of Swiss tennis, one name trumps all others. Yes, Stanislas Wawrinka is playing terrific tennis.
Serena Williams is the heavy favorite to win the year-enders in Istanbul. But it wouldn't be nice if we didn't assess the other players' chances, too.
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.
This one didn't come easily for Serena Williams, but she's sprinting full stride into tennis history.
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.