The 16-year-old Russian continues to blaze a trail on the WTA Tour.
"I thought that was an unethical end to that collaboration," Qinwen Zheng said of ex-coach Wim Fissette.
"I don't agree with that...this is not acceptable," world No. 1 said.
The American hopes to ride her momentum to a strong finish in 2023.
The Belgian supercoach parted ways with Zheng after a brief partnership that yielded a quarterfinal at the US Open.
The Slovenian umpire is provisionally suspended, pending Anti-Corruption charges.
"It was a really tough, tough loss for me. It was super emotional," Aryna Sabalenka said of her US Open final defeat.
