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.
Vienna finalist joins John Isner, Reilly Opelka, Jack Sock and Rajeev Ram on Team USA.
The 2021 ATP season came to an end on Sunday in Turin - here's how the rankings shape up.
A look at the WTA's year-end 2021 rankings...
The IOC has contacted the Chinese star vie video conference call.
