Is Victoria Azarenka's Late 2013 Slump a Big Deal?

A season that started out with a bang for Victoria Azarenka has ended with a whimper. On Sunday, Li Na and Serena Williams will face off in the final of the WTA Championships. Azarenka, the two-time Australian Open Champ and No. 2 in the world, will already be on vacation. That's because Azarenka didn't even make it to the semifinals of the WTA Championships in Istanbul. The Belarusian only went 1-2 in the round-robin play, despite being the highest-ranked player in her group. Even her lone win,...