World No. 1 aims to avenge 2019 ATP Finals loss to Dominic Thiem.
Dominic Thiem has no plans to join Novak Djokovic's PTPA.
World No. 1 says recent ruling sends strong message ATP doesn't "want PTPA at all in the system."
Diego Schwartzman on state of the PTPA and Novak Djokovic's role.
It isn't quite clear when players will be allowed to travel to Australia for the 2021 season.
Defending champion gets real about what it will take to stop Rafael Nadal.
Stefanos Tsitsipas offers gift-giving suggestion after sending Dominic Thiem into ATP Finals semifinals.
