Ferrari is making "too many mistakes" in its quest for the world championship, according to 2016 world champion Nico Rosberg.
Championship contender Sebastian Vettel was obviously unhappy after qualifying behind his teammate Kimi Raikkonen at Monza. It is believed he thought the Finn should have been providing rather than receiving the slipstream.
Power struggle
Ferrari's car is now clearly faster than Mercedes', and Rosberg told La Gazzetta dello Sport that the Italian team's progress has been impressive.
READ: Italian GP: Hamilton triumphs at Monza as Ferrari flounder
"It's true that Ferrari makes a strong impression. But the bottom line is all about points, and who is the world championship leader?
Ferrari makes too many mistakes. But it is true that Mercedes is under pressure," said the German.