Andy Murray had to virtually be helped off court following his loss to compatriot Cameron Norrie in Cincinnati two weeks ago as he was cramping so badly.
"If it's conditioning-related, I'm not going to get fitter in the next few days. But if there is something else there that I could potentially change, whether it's eating or drinking or illness or something, then there's the possibility that could change pretty quickly." Andy Murray
It’s a problem which the former world number one has had to contend with this year during the Tour’s American swing and he is desperately looking for answers as he gets ready for next week’s US Open where he is currently scheduled to play on Monday.
“We’re trying to understand why exactly it’s happening,” Murray said.
“I’m doing sweat-testing in these conditions to see if anything’s changed in that respect because the sports drinks and the electrolytes and stuff that I drink, are made specifically based on my sweat tests.
“I haven’t done sweat testing for quite a number of years, so we’re just seeing if anything has changed in that respect.
“Some people think it can be hydration-related, conditioning-related, stress-related, whether you’ve not eaten the right stuff There can be a number of factors that go into it. It could be an underlying illness that’s there, so we’re just trying to get some answers.”
Murray, who won the US Open in 2012, will get his Flushing Meadows bid under way against Argentina’s 24th seed Francisco Cerundolo.
The 35-year-old is realistic that there won’t be an immediate solution to his cramping issue but hopes there is a chance of some improvement.
“If it’s conditioning-related, I’m not going to get fitter in the next few days.
“But if there is something else there that I could potentially change, whether it’s eating or drinking or illness or something, then there’s the possibility that could change pretty quickly.”