Andrea Dovizioso found the power and movement from his Ducati hard to manage on the bumpy and low-grip Catalunya asphalt.

The Italian, who set the fourth fastest lap time during Friday's MotoGP practice, 0.665s from Suzuki's Aleix Espargaro, explained:

"The difficulty today was to manage the power and movement, because the grip is very low for everybody and the bumps from the [F1] cars are very difficult to manage. The cars create big bumps for us and MotoGP bikes have too much power, so we have to work on the set-up of the bike but also a lot with the electronic side - the power and traction control - because you cannot use too much power in this condition. Especially this afternoon when the grip was worse.

"I think it is also the reason why Suzuki was very fast today. I think today the bike wasn't perfect for me. The lap time is there so this is very important and means the base is good, but we have to work to be smoother because it is moving too much and for the race it is impossible to ride like this. So we have to understand how to manage the movement and especially the power because the track condition become quite difficult for MotoGP bikes. For sure we will speak about it in the safety commission."

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Dovizioso added that he was not too surprised by Espargaro's speed.

"Espargaro is a really fast rider, especially in practice, and in this track he was also very fast last year," Dovi said. "But I think it is also a consequence of not being able to use too much power at this track. It looks from the outside that their chassis is really good and at this track it is very important to have good feeling at the front. I'm surprised and happy for him but not too surprised."

During Friday's sessions, Ducati conducted special tests on their winglets to ensure they didn't touch the kerbs.

"I didn't have any problems but we need to understand the margin for Sunday because the kerbs are very high here."

Team-mate Andrea Iannone was sixth quickest.