He also Tweeted out the front page of the Herald Sun that reads, "If the self-appointed censors of Mark Knight get their way on his Serena Williams cartoon, our new politically correct life will be very tiresome indeed".
The 20-year-old kept her focus amid opponent Serena Williams' controversial clash with umpire Carlos Ramos to win 6-2 6-4.
"Mark Knight's cartoon depicting Williams destroying her racquet and jumping up and down, with a dummy spat nearby, mocked the star player for her behaviour", the editorial insisted.
Herald Sun editor, Damon Johnson also chimed in.
Knight's Twitter account appears to no longer be active.
Naomi Osaka of Japan gives a speech with the trophy after her victory in the WTA final over Daria Kasatkina of Russian Federation with her coach Sascha Bajin during the BNP Paribas Open at the Indian Wells Tennis Garden on March 18, 2018 in Indian Wells, California.
The cartoonist denied it was racist, saying he had meant to depict only the tennis player's "poor behaviour".
'It had nothing to do with gender or race, ' he said in the publication. She was then docked a point for a second violation after smashing her racket, followed by a penalty in which she lost a game because of "verbal abuse" of the chair umpire.
Williams later broke her racket and shouted at Ramos, which led to a penalty point and a game penalty.
During a changeover, Williams resumed her argument with the umpire, this time saying he was attacking her character and was a "thief".
Williams, who was fined $17,000 for the three code violations, said after the match male players were held to a lower standard for court conduct.
Williams' accusation of sexism has been backed by The Women's Tennis Association (WTA) and the United States Tennis Association (USTA), and this has seemingly upset a core group of umpires, according to The Times.
"Me, as a woman, take a lot of warnings".
"I think the umpire did what was within his rights", Murray told BBC Sport. Did she have to behave differently only because she was Serena Williams?
"At the time, I did kind of think they were booing at me 'cause I couldn't tell what was going on because it was just so loud in there, so it was a little bit stressful".