Former Grand Slam champion and BBC presenter Sue Barker says Williams "has a point" in her criticism of the umpire.
"I've sat courtside watching the men ranting at umpires and they haven't been given a violation," said Barker.
12-time Grand Slam champion and all-round tennis legend Billie Jean King has backed Williams.
She said: "When a woman is emotional, she's 'hysterical' and she's penalised for it. When a man does the same, he's 'outspoken' and there are no repercussions.
"Thank you, Serena Williams, for calling out this double standard. More voices are needed to do the same."
I thought her behaviour was totally unacceptable.
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