Within seconds, Cornet put her shirt back on the correct way.
However, when Cornet quickly removed her shirt on-court, the chair umpire deemed it a code violation, and penalised her.
Many prominent figures in the tennis world subsequently expressed their outrage on Twitter.
Andy Murray's mother Judy Murray, a tennis coach in her own right, claimed there are double standards at play. She realized that her shirt was on backwards, then took it off with the sole intention of fixing her mistake.
Surprisingly, the umpire Christian Rask handed her a code violation, which drew heavy criticism from observers.
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Male players frequently change or remove their shirts between games and sometimes sit shirtless for extended periods of time in their chairs during changeovers.
While Bethanie Mattek-Sands labelled it "weak", Casey Dellaqua called it "ridiculous".
On Tuesday, temperatures close to 38C (100F) at Flushing Meadows were made more stifling by humidity levels of over 50%, with five male players forced to retire due to heat-related issues.
This code violation came under the grand slam rules and we are pleased the USTA has now changed this policy.
A statement read: "All players can change their shirts when sitting in the player chair". "We regret that Ms. Cornet was assessed a code violation".
Andy Murray's US Open under cloud after defeat in Cincinnati Winning US Open is unrealistic admits Andy MurrayAn extreme heat policy, offering female players the short break before the deciding third set can be played, was implemented on medical advice at the NY tournament after temperatures soared to 38C. However, luckily, she was assessed a warning only and there was no further penalty above a warning.