 In September 2018, a cartoon by Knight depicting tennis player Serena Williams having a tantrum during the 2018 US Open was criticised as racist by international media and commentators, who noted the resemblance between Williams' facial features in the cartoon and American racist caricatures of the 19th and 20th century.Knight and the "Herald Sun" defended the caricature as depicting Williams' behaviour and having nothing to do with race, and Knight said he knew nothing of the Jim Crow period or drawings.A day later, the "Herald Sun" reprinted the caricature depicting Williams on the front page with the headline "Welcome to PC World".