He may have been the fastest man in the first two practice sessions at Silverstone, but Nico Rosberg wasn't overjoyed with his Mercedes car.
Fresh from winning the Austrian GP, Rosberg topped the timesheets ahead of team-mate Lewis Hamilton in FP1 while he was ahead of the Ferraris of Kimi Raikkonen and Sebastian Vettel later in the day with Hamilton down in fourth.
However, it wasn't a smooth day for the German as he suffered a loss of hydraulic pressure in the morning while also wasn't pleased with the W06 during Free Practice 2.
"I'm not that happy as the car was a bit all over the place still but, in the end, I got the laps in," he said.
"[The hydraulic issue] was a bit of a nuisance, especially to lose some running, but the team did a great job to turn the car round and get me out again. They completely dissected the car, took the rear end away, put a new one on and got me going again, all within 45 minutes – which is incredible."
Although it has been hot in the United Kingdom over the past few days, Rosberg warns that they need to look further ahead and make sure the car is set-up for cooler conditions.
Some drivers also struggled with the wind with at least three cars ending up in the gravel at Luffield.
"It is a lot hotter now than it will be on Sunday for the race," he said. "We need to be careful with that as a balance which is good today is not going to be ideal for Sunday – not by far. We need to think ahead, but I think it was still valuable today.
"For sure, it is the same for everybody, but it's going to make it difficult in the race tyre wear-wise. If you set your car with understeer or oversteer, how's it going to be when it's a lot colder? The balance changes a lot and then which tyre wears most? The front end? The rear end? Everything changes with temperature…
"It's an extremely different track and, for one, we've gone to the hard tyres, which we've not used in a while now. It's the fastest track of the year in terms of average corner speed, so it's very, very fast and that means it's a totally different requirement for the car.
"We've come here with quite a different set-up on the car based on historical knowledge, but to try and perfect it is challenging. There are so many different types of corner here – low speed long corners, low speed short, high speed, there's everything – and to get the best compromise around here is difficult."