In "Labyrinth of Evil" Mace Windu and General Grievous engage in a lightsaber duel aboard a hover train on Coruscant. At the end of the duel Grievous attacks with his lightsabers swinging toward Windu's neck when Windu abruptly ends the duel with a force push, blowing Grievous off the train. In "Labyrinth of Evil" Windu never crushes Grievous's chest.
It depends on whether you believe the Books or the Cartoon.
"You will pay the price for your lack of vision!" - Palpatine