Nico Rosberg says he expects team-mate Lewis Hamilton has speed in reserve ahead of qualifying for the Abu Dhabi Grand Prix, adding that his ageing power unit is bleeding speed on the straights.
Though the German ended the first day of action around the Yas Marina Circuit with the fastest time, he admits he is sceptical as to whether he can maintain it for the remainder of the weekend as he is running an older engine than that of Hamilton.
Prompted by the loss of a Mercedes engine during the Italian Grand Prix, Rosberg is anticipating a 'difficult weekend' despite his strong opening.
“It's a good start to the weekend and even though Lewis has been showing his pace on one lap and in general, it's going to be difficult because I have an extremely old engine, having lost my fourth engine, so I have a lot of miles on it and that's costing me straight-line speed. It's going to be a difficult weekend as a result, but I'll just have to be quicker in the corners!
“It's very, very high mileage because it's a very old engine. This track is an engine track, and it was already difficult in Brazil and the race before that, but now on the straights this is an engine track and it will cost me in lap time. It is what it is and I just have to make the most of it.”