Andy Murray receives test results after US Open preparations marred by mysterious glitch

He said he would watch his food and drink intake while competing at Flushing Meadows, adding, "Generally I'm pretty accurate and good with it, but it's a good balance for me. make sure you get the right fluids when you're in the field.

"I take 1.5 liter bottles on the court to make sure I drink enough at the right time. In these conditions, I always try to drink 1.5 liters of my sports drink in 40 minutes .

"But if you have two games that last 15 or 20 minutes, it's hard to make sure you're drinking enough. If you take too much, you can feel bloated.

"The last few days of training I actually felt a bit better in the conditions, so hopefully Monday will be fine."