Marin Cilic never quite seemed to play to the sum of his parts, but after a controversial suspension, he's now on fire.
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.
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.
Who will seize London? Rafael Nadal, Roger Federer and Novak Djokovic had their turns dominating portions of the season. So, logically, Andy Murray will win the ATP World Tour title, right?