Mats Wilander cites two major stumbling blocks 40-year-old Swiss superstar faces.
Stefanos Tsitsipas has undergone an elbow procedure, but still aims to play the Australian Open.
Australian Open tounament director Craig Tiley believes Novak Djokovic will play for history in Melbourne.
Coverage of the U.S. vs. Italy, starts at 10 a.m. Eastern on Friday, November 26th, will stream live on CBSSports.com and on the CBS Sports app.
The tour reacts to eliminate unecessary dead time during matches.
The Aussie broke the news on Instagram.
Former world No. 1 completes loaded lineup for Mubadala World Tennis Championship.
