Aryna Sabalenka — the world’s No. 1 women’s tennis player — is kicking ass on and off the U.S. Open courts … blasting a reporter for asking what she views as a ridiculous question about NYC parties.

Sabalenka talked to the media Wednesday night after beating Polina Iatcenko 6-1, 6-1 to advance to the third round … and one journalist dared to ask about her mood at the tournament after she was seen partying last week. Wrong move, pal, ’cause Sabalenka lost it.

Like a calm before the storm … Sabalenka sighs, shakes her head, rolls her eyes and then lit into him, saying, “You guys are, like, a joke. Parties, fun. Like, why would you even say that? Why would you even think about that? Like, what kind of question is that?”