Naomi Osaka says Jelena Ostapenko's comments to Taylor Townsend about her having "no class" and "no education" was "one of the worst things you could say to a black tennis player".

Taylor Townsend says Jelena Ostapenko told her she has "no class" and "no education" after the American beat her in the US Open second round.

“She told me I have no class," Townsend said in an on-court interview after her 7-5, 6-1 victory.