Diego Schwartzman sums up the degree of difficulty facing Novak Djokovic simply.
The World No.1 says that the best-of-three format is best for the future of tennis.
US Open champion handicaps ATP Finals field.
Hall of Famer Bjorn Borg offers a surprising answer on Roger Federer's asset.
The Austrian says that he's eager to play Tokyo in 2021.
The Scot says facing Federer on grass and Djokovic on hard is tough, but not as tough as facing Nadal on clay.
Rafael Nadal has a simple mindset for this weekend's ATP Finals.
