Roger Federer had a feeling he was in trouble against Juan Martin del Potro.
World No. 1 on what he admires most about Federer.
Roger or Rafa? CoCo Vandeweghe has a clear favorite.
Top seed assesses Vandeweghe's game bluntly after US Open quarterfinal loss.
Karolina Pliskova isn't mourning the loss of the top spot.
Garbine Muguruza will become the WTA's 24th No.1 on the Monday after the U.S. Open
International Tennis Hall of Fame announces nominees for Class of 2018.
