Haas driver Romain Grosjean was left less than impressed with the behaviour of Lewis Hamilton during Friday free practice for the Austrian Grand Prix. 

Grosjean was forced into a spin during FP1 as he aimed to avoid three-time Formula One world champion Hamilton, who had lost control of his Mercedes just ahead at turn three. 

The pair avoided contact, but Grosjean believes it could have ended in a major collision, 

"I wasn't very happy with Lewis' behaviour on track today," the Frenchman said. 

"He spun, he didn't put the brakes, he reversed in the middle of the track, and I was coming, so to have avoided I had to spin the car.

"We could have had quite a big crash this morning. It's not something you want on your first run in FP1. 

He added: "Then in FP2 again he was doing some qualifying run and he going straight at turn two, coming back and staying in the middle of the track."

Grosjean was 10th fastest in FP1, but could only manage the 20th best time in a rain-affected FP2.