She won a lot of tournaments yes. But she is a spoiled child on the court. And not in the fun way that John McEnroe was, but in a nasty mean way, abusing ball boys / girls, and chair umpires, and generally disgracing her sport. She's a black woman so she gets a pass. Anyone else would have been run off the tour.
An Australian newspaper was hauled into a review by the Australian Press Council for this cartoon, accusing them of racism. The newspaper won the ruling.