Kei Nishikori's coach has admitted that the Japanese player is unlikely to play in the Australian Open next month because of a wrist injury.
The world number 14 has not played since the Rogers Cup in Montreal four months ago after tearing one of the tendons in his right wrist.
It had been expected that Nishikori would be fit enough to be involved in the first Grand Slam of the year alongside Andy Murray and Novak Djokovic, who missed the second half of 2017 because of hip and elbow injuries respectively.
However, Nishikori's coach Dante Bottini said: "To compete we understand that it will be for after the Australian Open.
"I hope it is before, but I think it will not come. After a month, maybe he can start to hit the ball."
Nishikori recently said that he would compete at the inaugural New York Open, which is replacing the Memphis Open, and will take place in mid-February.
The 27-year-old said at the time: "Playing in New York has always been exciting for me and to think I could win a fifth title during this ATP Tour week would be amazing. I'll miss Memphis, but I'm going to love New York."
Murray is 1213.00 to win the Australian Open, while Djokovic can be backed at 6.00, Roger Federer at 2.75 and Rafael Nadal at 5.50.
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