Mercury center Brittney Griner and Sky guard Cappie Pondexter were both ejected during the third quarter of Tuesday night's game.
Griner and Pondexter collided on a high screen with 9:33 left in the frame, and after teammates got between them, Griner pushed Pondexter in the head. Officials reviewed the play and called Pondexter for a flagrant foul 2.
Chicago would go on to win 79-77 on a Jessica Breland putback with 0.2 seconds left.
This marks the second time Griner has been ejected this month. She was tossed on July 1 for arguing with an official after picking up her fourth foul in a loss to the New York Liberty.
Information from The Associated Press was used in this report.