Gasly aborted his lap, slowed down alongside Grosjean, and waved his fist.
At the same time, the Haas driver turned into the corner and they made side-to-side contact, sending bits of bodywork flying.
The stewards called both drivers to a hearing, with suggestions that Grosjean might be trouble for impeding and Gasly for expressing his frustration.
However, in the end the stewards announced that there would be no further action.
Grosjean said that he had had no warning from his team of Gasly’s approach.
The stewards noted: “The driver of car 10 [Gasly] conceded that he did not think the driver of car 8 [Grosjean] was able to see him and it was noted that the closing speed differential was well in excess of 120 km/h.
“The driver of car 8 received no warning from his team by radio and stated that he had no visibility of car 10’s rapid approach.
“He stated had he known car 10 was approaching he would have moved completely off the track. Instead he turned into the corner, somewhat off the racing line but in doing so came into contact with car 10 which was on a push lap, and was unable to avoid it due to the very high speed differential.”