Tennis: Serena tight-lipped on joining Djokovic's new federation

Serena Williams didn't give much away when asked whether she'll join Novak Djokovic's new players' federation. Williams: "Well yeah, [me and Djokovic] spoke a little bit right before, like a day before the day of the tournament. And that was between me and him, and right now I'm really focused on the US Open and nothing else I can think about right now."