British number one Andy Murray has cast doubt over his chances at the US Open, the final Grand Slam of the season.
Murray is considering not playing any more matches before the Open
The Scot's comeback from a wrist injury was halted in the Montreal Masters second round by qualifer Fabio Fognini, with the US Open just 19 days away.
"I'm definitely not 100% ready," said Murray. "I'm not too close in match fitness but in terms of being pain-free I'm getting there, maybe 70 or 80%.
"But there's something seriously wrong with my wrist if I'm not fine to play."
Murray was forced to miss both the French Open and Wimbledon after suffering a right wrist injury in May at the Hamburg Masters.
The world number 13 had planned to make a full return to the Tour on the US hardcourts, but specialist treatment on his wrist delayed his comeback.
When it comes to a wrist injury you can't necessarily get away from it as you use it on every single shot
Murray had intended to play consecutive tournaments in Montreal, Cincinnati and New Haven ahead of the Flushing Meadows Slam, but may now opt to focus on his training.
"I haven't decided what I'm going to do yet," said Murray. "I might stay here and train. I might go to Florida to practise.
"We'll make a decision probably on Thursday or Friday.
"I feel like I'm getting there. I got to play back-to-back matches so it was almost like an intensified practice session for me here.
"I just need to get more matches, because once I play more then I'll obviously feel more and more confident."
Murray did admit, however, that it would take a little more time to rebuild full faith in his wrist.
During his first-round victory against Robby Ginepri and his loss to Fognini, Murray was particularly tentative with his forehand.
"When it comes to a wrist injury you can't necessarily get away from it as you use it on every single shot," explained Murray. "Mentally, you are thinking about it.
"My wrist isn't any worse and I don't think that I opened up on my forehand too much more than I did against Ginepri.
"It is getting better but it's not quite there yet, but in two or three weeks it should be OK.
"It's just about building up the confidence to hit out fully, so I can play my regular game instead of playing at the net and rushing which is not natural to me.
"If I had to, I'd go out and play the US Open even if it was my first tournament (back)."