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Mark Knight's cartoon, which was published in the Australian Herald Sun newspaper, showed Serena jumping above a broken racquet next to a baby's dummy. Her lips and muscles were also made to look much bigger than they are.

Many people complained that the cartoon featured racist stereotypes. Mark Knight denied the accusation, saying he had intended only to depict the tennis player's "poor behaviour".

(Picture: Serena Williams argues with the referee Credit: Timothy A. Clary/AFP/Getty Images)