World number one Novak Djokovic says male tennis players should earn more money than their female counterparts because more people watch them play.
Earlier, Indian Wells tournament CEO Raymond Moore said the women's WTA Tour"ride on the coat-tails of the men".
After claiming victory at the BNP Paribas Open in Indian Wells, 11-time major winner Djokovic said the men's tennis tour "should fight for more".
But the Serb described Moore's comments as "not politically correct".
Djokovic, 28, said women "fought for what they deserve and they got it", but claimed prize money should be "fairly distributed" based on "who attracts more attention, spectators and who sells more tickets".
There has been equal prize money in all four majors - the Australian Open, US Open, French Open and Wimbledon - since 2007, and combined Masters events such as Indian Wells and Miami pay the same to men and women.
But female players are paid significantly less at women-only events when compared with similar sized men's events.
World number one Serena Williams said Moore's statement was "offensive", calling it "mistaken and very, very, very inaccurate".
"There's only one way to interpret that. Get on your knees, which is offensive enough, and thank a man," added 21-time major winner Williams, 34. "We shouldn't have to drop to our knees at any point."
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