Cornet changed her shirt during a 10-minute break before the deciding third set of her first round match in NY, but on returning to court in the match against Swede Johanna Larsson, she realised it was on back to front.
Responding to Cornet being unfairly singled out, King on Wednesday tweeted that the USTA rule on shirt changes by women players was "outdated and impractical". I'm glad they apologised, and I hope this never happens again.
Cornet said she was surprised to wake up on Wednesday to a full-blown controversy and attempted to downplay the incident.
Cornet would lose to Larsson, 4-6, 6-3, 6-2.
In response, the umpire handed the French player a code violation - despite the fact male players are allowed to change on court.
The USTA has since said it is not a violation for players to change attire during the match, regardless of gender.
The Women's Tennis Association rulebook states that female players are only permitted to remove or change their clothing while they are off the court at the closest, most private location.
"If I would say my true feelings, it would be bleeped out, because I think it was ridiculous". The chair umpire then gave her a code violation for removing her shirt on the court.
In searing heat and humidity and about to receive serve, the World No.31 realised that she had put her fresh kit on back to front, and quickly turned her back to correct the issue.
Realizing it had stepped on a public relations landmine, the USTA was quick to issue a statement saying the code violation was wrong while the WTA leapt to Cornet's defense, labeling the penalty unfair.
Twitter user Alissa Warren also said: 'Busted for code violation #alizecornet took 10 sec to turn top right way but #novacdjokovic can sit for minutes half-naked.
In 2017, the men's ATP World Tour had prize money of US$197.7 million compared with US$139 million for the women's WTA Tour. She was given no further penalty or fine.
The US Open has clarified its rules about players changing their shirts during a match.
"Alize did nothing wrong", the WTA said in a statement. "Unsportsmanlike conduct.... But the men can change shirts on court", she questioned.