Talk about a roller-coaster year. A loss in Caroline Wozniacki’s personal life—her fiancé, Rory McIlroy, broke off their engagement in May—coincided with a big gain in her professional life. In danger of falling out of the Top 20 before the break-up, she rebounded to reach the US Open final, finish the season No. 8 and finish her first marathon in a stunningly fast time (3:26). The only reason Wozniacki didn’t go further at the end of the year was that she kept running into, and losing close matches to, her friend Serena Williams.
It had appeared that Wozniacki’s best years were behind her—she finished No. 1 in 2010 and 2011, before dropping to No. 10 in 2012 and 2013. Now, at 24, it looks like she’s in her prime again. Not only did she start going deep at tournaments, she started beating players who had seemingly passed her by; Wozniacki finished with wins over Maria Sharapova, Agnieszka Radwanska and Petra Kvitova in Singapore. Look for her to rise a little more in the rankings to start 2015; she doesn’t have a lot of points to defend early in the year.