• Australian crashes out after collision • Grosjean ran into back of Toro Rosso

This article is more than 7 years old

This article is more than 7 years old

Australia's Daniel Ricciardo has branded rival Formula One driver Romain Grosjean dangerous after the Lotus driver cannoned into him in Sunday's Monaco Grand Prix.

The erratic Frenchman, who has been involved in a number of controversial crashes in recent seasons, sparked another spectacular incident when he ran into the back of Ricciardo's Toro Rosso, ruining both drivers' race.

Grosjean was hit with a 10-place grid penalty for next month's Canadian Grand Prix after the collision, which happened under braking at the Nouvelle Chicane late in the race.

It ended Ricciardo's race immediately and Grosjean retired a lap later.

Ricciardo was heard over the team radio saying: "You can probably guess the driver."

The incident led to a safety car being deployed to clear debris from the track.

Ricciardo, who struggled with his start in Monaco, said he was feeling comfortable on his second tyre choice before his race was ruined.

"I could see that Grosjean had got a good run out of the tunnel and that he was close, so I defended my line and the next thing I knew he was over the back of me," Ricciardo said.

"I haven't seen it on a TV yet, but at the moment I believe it was a misjudgment on his part and a costly one that was quite dangerous, even if we are both okay."

Grosjean, who also crashed in practice and in qualifying in Monaco, blamed the Australian.

"Daniel seemed to be really struggling with his rear tyres," he said. "I was caught out by him braking early in the middle of the circuit and there was nowhere for me to go.

"It's a frustrating end to the weekend, but the real damage was done in qualifying when I didn't get through to Q3 (final qualifying)."

"That was Daniel again, who I was held up by. But it certainly wasn't my intention to end my race in the back of his car."

Grosjean earned a reputation for reckless driving last season and was banned for one race for causing a pile-up at the Belgian GP.

He was even told by his own team to be less aggressive.