Alexander Zverev is working with David Ferrer on a 15-day trial basis.
The Aussie is on the Twitter attack once again.
The World No.103 says he's not comfortable travelling to New York this year.
Former world No. 5 says there three good reasons to cancel the US Open.
Grand Slam king says patience is key to comeback from knee surgery.
The ITF's Annual General Meeting will be held virtually on November 21st.
Eight-time Wimbledon winner aiming for another shot at SW19.
