"My rehab is going well but I am just not ready 100% to come back yet in best-of-five-set matches." Nishikori was ninth in the world ranking before sustaining a season-ending wrist injury ahead of the Cincinnati Masters last August. He had been hoping to make his return at the season-opening Brisbane International, where he was runner-up in 2017, but withdrew from that event 11 days ago.Kei Nishikori is out of the Australian Open—his second straight Grand Slam tournament missed with a wrist injury: https://t.co/6VPihRmDlv pic.twitter.com/wwRT6Ft734
— TENNIS.com (@Tennis) January 4, 2018
Nishikori became the first Japanese man to reach a grand slam final at the 2014 U.S. Open but did not compete at Flushing Meadows last year because of his injury. The Australian Open will be played from Jan. 15-28.Kei Nishikori has withdrawn from the 2018 #AusOpen because he is not ready to return to best-of-five matches after suffering a right wrist injury https://t.co/aEg58EVyUo pic.twitter.com/iKbJDUWVuB
— SI Tennis (@SI_Tennis) January 3, 2018