Hamilton topped both practice sessions on Friday, with Red Bull looking strong in FP2 as Rosberg finished the second session 0.7s adrift of his team-mate in fourth place. Explaining the gap, Rosberg says he is not happy with the handling of his car as it is inconsistent over one lap.
"Not ideal today, I just didn’t find the balance in the car," Rosberg said. "There was a lot of understeer and it went from oversteer to understeer and it was a bit difficult to explain. I was always chasing my tail, so I wasn’t very happy about that and we need to work on that for tomorrow.
"Tomorrow morning is free practice and I have enough time to get into it and sort it out, but race pace was very good today."
However, asked if he is confident he can turn the situation around on Saturday, Rosberg replied: "Yeah, I’m confident because I always have in the past even when there have been difficulties in a weekend, so it will be okay."
While expecting to be ahead of Red Bull in qualifying, Rosberg says he needs to get the most out of FP3 to challenge Hamilton for pole.
"The car is good and the car is good anyway, it’s just quick in every sense of the word and quick here too. It was just a bit of a difficult day for me and I need to improve on my qualifying pace – the race pace was very good. I still need to work and find the right balance because we have too much understeer, but tomorrow morning I’ll have plenty of time to work on that."