Every Slam tournament has its giant killers. They're a big part of the fun. Barbora Zahlavova-Strycova has taken out two seeded players en route to Wimbledon's second week: Na Li (2nd seed, China) and Elena Vesnina (32nd, Russia). Her next opponent, today on Court 12, is Caroline Wozniacki (16th, Denmark), my pre-tournament favorite. On the one hand, BZS did Wozniacki a huge favorite by taking out Li and Vesnina. Wozniacki has never made it past the fourth round at Wimbledon so this is a great opportunity. On the other hand, who's to say the giant killer won't strike again?