Latvia's Jelena Ostapenko says "English is not my first language" after telling American opponent Taylor Townsend she has "no education".

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.