Verstappen and Piastri tumbled down the order, where the McLaren star also collided with Franco Colapinto.
As a result of the incident, Verstappen was awarded a 10-second time penalty for his move on Piastri.
The Australian also received a 10-second penalty after his collision with Colapinto, in what could prove to be a major blow to McLaren's constructors' championship chances.
Max Verstappen and Oscar Piastri both received penalties at the Abu Dhabi GP