Former world number 1 Caroline Wozniacki has fired her coach of two months, Ricardo Sanchez, and is now working with--all together now!--Piotr Wozniacki. Coach Wozniacki said that Caroline failed to get "new impulses" from working with Sanchez, and that working with two coaches (which you knew she was doing) caused his daughter to get confused.
Wozniacki lost her number 1 ranking after the Australian Open. Australian Open champion Victoria Azarenka is now number 1, and Wozniacki is number 4.
Between the never-seen mystery coach and the barely-seen Sanchez, it seems more obvious than ever that the Wozniacki pair will continue to work together. Sanchez had signed a one-year contract, and one assumes he knew (I mean, if I knew) that Piotr Wozniacki was not going to step aside.
In March and April, Wozniacki has titles to defend in Indian Wells and Charleston (this is assuming that she'll play in Charleston). In 2011, she reached the third round of the French Open, in which she was defeated by Daniela Hantuchova.