The two-time Slam champion and fan favorite took to social media to voice her complaint.
The American will make her second consecutive apperance at the WTA Finals.
"It is frustrating," Ons Jabeur said of the WTA's new performance byes.
The Pole is happy to play without the pressure of maintaining the No.1 ranking.
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.
