Rafael Nadal admits he is considering shutting down his season in order to work on his game and come back stronger next year.
The 30-year-old has been way below his best in 2016 and has not reached a final since winning on his favoured clay in Barcelona back in April.
The Spanish ace has won 14 Grand Slams in a glittering career, including an incredible nine French Open titles, but a run to the fourth round at Flushing Meadows was his best effort in the 'Slams this season.
He lost in the first round of the Australian Open and the third round at Roland Garros while injury kept the left-hander out of Wimbledon.
Nadal looked out of sorts when losing 6-3 7-6 to Viktor Troicki in his first match at the Shanghai Masters earlier this week and is clearly in a quandary as to whether to play the remainder of the campaign or get back on to the practice courts to try and iron out his problems.
"I don't know what's going to happen in the next couple of weeks," said the Majorcan. "It's something that I need to think about.
"I cannot say now what I'm going to do during the next month. I'm not sure about my calendar. I'm not sure about the things that I need to do to try to be 100 per cent ready for next year.
"Sometimes keeping competing is not the solution. Sometimes the solution is to practice and stop and have a process of training. And maybe that's an opportunity to do it.
"I'm not sure about that. Maybe I'm going to play in Basel in two weeks. So it's not the day and not the moment to analyse all these kind of things."