Cape Town - Andy Murray has moved to temper expectations ahead of the US Open, saying he is unsure whether he will be physically ready for the rigours of singles competition.
Having undergone hip surgery at the end of January, the three-time Grand Slam singles winner made his return in the men's doubles at Queen's Club in June.
He also teamed up with Pierre-Hugues Herbert in the men's doubles at Wimbledon before they exited in the second round while he is still competing in the mixed doubles alongside Serena Williams.
However, the big aim is to make a return to the singles, but the final Grand Slam of the year, the US Open at Flushing Meadows, is a bit too soon for the 32-year-old.
"I think it's pretty unlikely I'll play (at the US Open)," he said. "I talked to my team a bit about this. There's just a lot of stuff to get done physically so I'm stronger.
"The amount of work I need to do on the court to get ready for singles, the amount of work I need to put in off the court to be strong enough to play best-of-five sets - that's still quite a long way away, unfortunately.
"I would love to play but I need to look, like, pretty long-term with this. I don't want to be having to go through another big operation in a few years' time. I want to make sure the operation I've had lasts for as long as possible. To give it the best chance, I need to make sure that I'm physically really strong."