Speaking to Sky Sports, Rosberg was critical of the Dutchman's error that may well have cost him a chance at victory around the streets of Monte Carlo.
"That was a big big setback. He was on course for the Monaco race win, he was quicker than Daniel (Ricciardo), he was really on it out there and then just shunts it big time into the wall.
"It's always risky in Monaco but to get the win that's exactly the thing that you need to avoid. We've seen from Daniel that it's possible to avoid those kind of incidents whilst going massively quick.
"First of all there's the question of can they get the car ready? Is this chassis OK? And then what has it done to his confidence? It's such a big blow."
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