Nico Rosberg says he doesn't have an explanation for why he was unable to challenge team-mate Lewis Hamilton for pole in qualifying for the Hungarian Grand Prix.

After struggling on Friday, Rosberg was right up with Hamilton in final practice, with less than a tenth between them. However in the top-ten shootout, the German had no answer and finished more than half a second back, although that was still good enough to put him on the front row of the grid, 0.144s up on Sebastian Vettel's Ferrari in P3.

"I don't have an explanation," Rosberg admitted. "Qualifying went pretty much to plan... I just didn't find the pace. It has been a bit up and down all weekend for some unexplained reasons. I just need to look into it tonight. I am definitely not happy with the way it went today."

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Rosberg was heard complaining about a variety of issues during qualifying - reporting understeer, asking if the tyre pressures were wrong and also reporting issues with the aero balance - and when pressed on what was the issue, he merely reiterated that it is something he will have to look into.

"I generally just wasn't happy and I don't understand it. We need to look into it. It was just a bit inconsistent, so difficult to explain. I don't know. But I wasn't happy with the general way qualifying went," he continued.

Despite his problems, however, Rosberg reckons he will be able to challenge Hamilton for the victory come race day.

"There is going to be some opportunities definitely with the strategy. Let's see. We are going to go into that tomorrow morning. If anything, my balance is for the race, which is not what I wanted, but it is the way it has gone," he concluded.