Retired Australian tennis player Casey Dellacqua responded to Murray's tweet, writing, \"Ridiculous.\"

American tennis player and Olympic gold medalist Bethanie Mattek-Sands also chimed in: \"That's weak!\"

Murray responded, \"Sure is......\"

Other Twitter users didn't mince words and called the incident \"sexist.\"

Cornet went on to lose the match to Larsson in three sets, 6-4, 3-6, 2-6.

Meanwhile, several male players were forced to retire early from their matches this week due to the scorching heat.

U.S. Open officials issued a statement on Wednesday apologizing for the penalty, saying Cornet's attire change was not a code violation.

\"All players can change their shirts when sitting in the player chair. This is not considered a Code Violation,\" the statement said. \"We regret that a Code Violation was assessed to Ms. Cornet yesterday. We have clarified the policy to ensure this will not happen moving forward. Fortunately, she was only assessed a warning with no further penalty or fine. Female players, if they choose, may also change their shirts in a more private location close to the court, when available. They will not be assessed a bathroom break in this circumstance.\"

Cornet appreciated the apology.

\"Well, I think it's very fair from them to apologize to me. I really appreciate it. I mean, I think that the proportion that it took is huge. When I woke up this morning, I didn't think that this code violation would become so famous in less than 24 hours, and I'm very surprised about it, actually, to be honest. Because on the court, it really seemed like a mistake from the umpire and nothing else. That's how I take it,\" Cornet said.

The Women's Tennis Association, the organizing body of women's professional tennis, also released a statement, saying Cornet \"did nothing wrong\" and the code violation was \"unfair\" and \"not based on a WTA rule.\"

\"The code violation that USTA handed to Alize Cornet during her first round match at the U.S. Open was unfair and it was not based on a WTA rule, as the WTA has no rule against a change of attire on court,\" the statement said. \"The WTA has always been and always will be a pioneer for women and women’s sports. This code violation came under the Grand Slam rules and we are pleased to see the USTA has now changed this policy. Alize did nothing wrong.\"

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