In one of the most bizarre episodes of the tennis season, France's Alize Cornet has been given a warning for temporarily taking her top off.
Organisers at Flushing Meadows are operating an extreme heat policy where female players take a 10-minute break before deciding third sets are played after temperatures reached up to 38C.
Having gone off court to change during the break in her match with Sweden's Johanna Larsson, the 28-year-old realised she had her top on back to front and quickly changed it.
However, she was called for a code violation by the chair umpire.
The decision was met with outrage, especially given that male players are allowed to change shirts on court.
Andy Murray's mother, Judy, took to Twitter to question the decision.
The tennis coach said: "Alize Cornet came back to court after 10-minute heat break. Had her fresh shirt on back to front. Changed at back of court. Got a code violation. Unsportsmanlike conduct ... But the men can change shirts on court."
As did others who also pointed out the fact that the men are allowed to do it.
"the fact that it happened in the first place is a joke, considering male tennis players are allowed to take their shirts off and put on fresh ones as often as they want during a match, without leaving the court." https://t.co/BSE7dkl548— nora bouazzouni (@norabz) August 29, 2018
Totally sexist! US Open umpire hits french player with a code violation after she quickly turns her shirt around because it was on backward. Male players do it.. and she was covered the whole time. Sorry but that's just wrong. #fox35 https://t.co/aVpAjhrRwj— Bob Frier (@Fox35Bob) August 29, 2018
Busted for code violation 🙄 #alizecornet took 10 sec to turn top right way but #novacdjokovic can sit for minutes half-naked. Same comp. Days after @serenawilliams slammed for disrespecting tennis because she wore a #catsuit. Not fair. Not right. Tell your daughters 🙌 pic.twitter.com/pJILnwvUvG— Alissa Warren (@alissawarren) August 29, 2018
Shocking by the #USOpen for penalizing @alizecornet for a 5 second top change. Indecent? Are you serious? Why one rule for the blokes but you expect a female player do what? Go off court? Get real. Stupidity and I hope she makes a stand along with the rest of the female players pic.twitter.com/wSGPdhBl90— Craig Bailey (@CraigBRadio) August 29, 2018