Perez had only just let Magnussen past when he tried to get back ahead exiting the Turn 8 downhill hairpin after Les Combes.

He had to back out of the pass, then started to pull alongside Magnussen on the run down to Pouhon before Magnussen moved to the left and forced Perez to slow down.

An irate Perez told his team over the radio that "Magnussen is so dirty, always", and raised the incident in drivers' briefing.

Asked by Motorsport.com if he thought Magnussen's move was intentional, Perez said: "Yes, he knew I was there because had just overtook me.

"I don't know what he was angry about but I just don't think it's the way to react. We've seen Kevin has reacted that way a couple of times already.

"It's not good, the speeds we are doing you can cause a very bad incident.

"That's why I wanted to raise a point. Hopefully Charlie [Whiting] keeps it in his mind because tomorrow there could be an accident and it may be too late."

It is the second grand prix weekend in a row that Magnussen's driving has been criticised by a rival.

After the Hungarian Grand Prix, prior to the summer break, Nico Hulkenberg approached Magnussen in the media pen and called him "once again the most unsporting driver", which led Magnussen to reply: "Suck my balls."

Asked by Motorsport.com about the incident with Perez, Magnussen insisted it was not deliberate.

"I didn't know he was trying to get back again, as he'd just let me past," he explained. "So I started warming up my tyres and he was close, but I hadn't seen him. It was not intentional."