The cartoon was intended as a lampoon of the tennis star's angry exchanges with chair umpire Carlos Ramos at the U.S. Women's Singles final in NY on Saturday.
She was found guilty of code violations and fined $17 000 - raising allegations that there are double standards for male and female players.
Leading the criticism, Rowling said it had reduced "one of the greatest sportswomen alive to racist and sexist tropes".
But he denies this in the video above.
Englishman Rose becomes world number one
Bradley, 32, burst onto the scene with a Major victory at the 2011 PGA Championship, but had not won since 2012 before Monday. He says he's speechless and it took a lot of hard work and he doesn't know what to say because he's so happy.
In the US Open 2018 final between Serena and eventual victor Naomi Osaka, the 23-time Grand Slam champion had a massive meltdown after she had lost the first set of the match and was given a warning for coaching violation.
Ramos is seen in the background of the comic, asking Williams's opponent if she can "just let her win".
The Melbourne-based newspaper issued an editorial Tuesday saying the backlash proved the world had "officially gone mad". "That's what the cartoon was about, her poor behaviour on the court", he said.
'It had nothing to do with gender or race, ' he said in the publication.
During the final against Osaka, Williams got a warning from the chair umpire for violating a rarely enforced rule against receiving coaching from the sidelines.
"We can not measure ourselves by what we think we should also be able to get away with", Navratilova wrote. It obliterates the fact that she is one of the greatest athletes of all time.
"Regardless of race or sex, they are lampooned due to their behaviour", the editors wrote of the public figures it caricatured. Serena Williams has rightly become an icon for the social and political aspirations of women of colour. "I have a daughter and I stand for what is right and I have never cheated". More than anyone else, we reinforce the glass ceilings she has smashed long before.
Osaka was portrayed as petite and feminine with jet blonde straight hair-in real life she has dark curly hair with blonde streaks and is taller than Williams.
"In her straight sets loss to Naomi Osaka, Williams was simply outplayed and lost her temper in a huge and ill-disciplined blow-up".
Knight's caricature showed a butch and fat-lipped Williams jumping up and down on her broken racquet, having spat out a dummy. It is therefore only logically that she be treated in a hostile manner by the forces for whom the image of black female excellence, success, autonomy, self-confidence and wealth is a threat.
People flee US coast as Hurricane Florence nears Carolinas
Florence is about 1,000km southeast of Cape Fear, North Carolina , and is packing maximum sustained winds 220km/h, the NHC said. It's now considered a Category 4 hurricane, but the NWS expects the storm to strengthen over the next day or so.
Pope to meet US bishops Thursday over abuse scandal
Cardinal Wuerl, as is customary, presented his resignation from the College of Cardinals upon his 75th birthday three years ago. A Vatican statement said the meeting also will include Los Angeles Archbishop Jose Gomez and Monsignor Brian Bransfield.