Sebastian Vettel says he is not entirely happy with the balance of his Ferrari SF16-H as he bids to repeat his 2015 victory at the Hungarian Grand Prix.
Vettel was third quickest during the second practice session at the Hungaroring, almost a second down on Nico Rosberg and three-tenths adrift of Red Bull's Daniel Ricciardo.
Vettel is hopeful he can make progress on Saturday though admits it is "no surprise" that Mercedes has a sizeable advantage.
"We need to better in sectors one, two and three – there is not one sector that stands out," he said.
"I am not entirely happy with the balance, so naturally if the balance comes more together I think we can improve overnight and improve in sectors one, two and three.
"It’s not a surprise that Mercedes is good."
Vettel also reckons Ferrari's rhythm was interrupted by the red flag period, caused by Lewis Hamilton's off at Turn 11.
"I think we lost a bit of time in the beginning with the red flag; it was not ideal," he said.
"We had to come in a couple of times and re-programme the car, so we had to come in and go out, but we were able to fix it so that’s good news.
"We lost a bit of the rhythm, but it was OK and the car felt fine and I think we can improve the set-up for tomorrow and find a better balance in the car."