Lewis Hamilton has hit back at Sebastian Vettel after the Red Bull driver likened the Mercedes cars to "two buses going for a cruise".
Nico Rosberg won the Monaco Grand Prix from pole position on Sunday with Vettel and his team-mate Mark Webber finishing second and third respectively and Hamilton, who started second on the grid, settling for fourth.
Rosberg controlled the race from the start and Vettel admitted afterwards that he was taken aback by the pace from the two Mercedes cars.
"I was surprised by the slow pace of the opening laps," he said. "You expect two Silver Arrows in front of you and we had two buses in front going for a cruise."
Hamilton, though, wasn't impressed by Vettel's comments.
"He has had the fastest car for the last four years, so it's easy for him to say that. He's got it easy," he said.
"We are making our way up, we are learning, growing, improving with a car that has great potential, so I don't agree with him."