Rafael Nadal took a break from vacation to follow Tiger Woods on the golf course.
Future uncertain for International Premier Tennis League.
The first international blind tennis tournament was held in 2017.
Stars gear up for the holiday season pumping up.
Former No. 1 tabs Zverev as future No. 1 and offers alternate view on champions coaching.
The former U.S. Open runner-up owns 35 titles between singles and doubles.
World No. 2 hasn't officially retired from Swiss Davis Cup squad.
