Andy Murray played a few solid matches after the third Grand Slam of the season but he still can't win consecutive matches to make a deep run at any event.
The Scot defeated players like Sam Querrey, Max Purcell and Stan Wawrinka but lost to likes of Mikael Ymer, Alexander Bublik and Cameron Norrie. In some of the matches, Andy Murray struggled with cramps and ahead of the 2022 US Open, he's trying to find out what is causing his body to react in a certain way.
"I'm doing sweat testing in these conditions to see if anything has changed in that respect because the sports drinks and the electrolytes is made specifically on my sweat tests, but I haven't done sweat testing for quite a number of years," said Murray per SkySports.
"I don't know if anything has changed in that respect but we'll try and get to the bottom of it, because let's say if it was purely from hydration, then obviously after I got cramp like in Washington I made sure that I was not dehydrated going into the next matches. And if it was eating related then I made sure all of those boxes were ticked."
"It's not just been as simple as changing how much I've been drinking or what I'm drinking so I need to get some answers. From the physical side it's been a bit frustrating right now because I've been pulling up from the matches really well in terms of where my body is today in comparison to last year, for example. I'm in a much better place in terms of how my left groin has been and my lower back - it's been really good," the 35-year-old said.
"There's been no need for me to take anti-inflammatories for matches and tournaments and stuff which hasn't been the case much for the last few years so that's been really positive but then at the same time I've had the cramping. Since I've been over here I've been lucky in some of the matches, like against [Stan] Wawrinka I was lucky to get through that one.