American tennis player Tennys Sandgren’s showdown with Serena Williams took a new turn on Wednesday when Williams sent out a tweet demanding an apology from Sandgren.

The entire episode began when Sandgren had earlier deleted vast majority of his tweets after he was questioned of being far-right in his political beliefs.

However, screenshots were already taken of the tweets he had deleted. One tweet was apparently linked to a story about Williams using foul language on court with the comment “disgusting” underneath.

Initially, Williams ignored the episode and even tweeted out two words: “Turns channel” when Sandgren began his quater-final clash with South Korea’s Hyeon Chung at the Australian Open. Sandgren lost his match 6-4, 7-6(5), 6-3.

On Tuesday, Sandgren said he had deleted his tweets to “make a cleaner start”. However, with Serena’s latest tweet, the entire issue is far from resolved between the duo.