McLaren pair's problems with medium tyres
This weekend, for the first time, Pirelli have provided a medium compound tyre which proved problematic in practice, especially for the McLaren drivers.
Jenson Button, who thinks that they are too hard for the Valencia circuit, commented: "The car's balance is good on soft tyres, and we've got no complaints, but we've still got loads to do with the harder tyre which works differently, and that makes life difficult."
Lack of grip was the main problem for both Button and Hamilton around the street circuit, and McLaren intend to analyse their data overnight. Button hoped things will be better for Saturday.
"We know what to do and the direction we need to take – which is good. We had very little grip on the hard tyres and struggled with both understeer and oversteer. As soon as we put soft tyres on the car, it was a different story.
"We now need to work out how to get both compounds to work with the same setup. We've got a lot to do, but I'm confident that we'll get both compounds to work."
Whilst Button finished in sixth place, Hamilton posted the second best time of the day but endured problems with his car.
"We're not light years away, but the balance could be better. There are some things we're going to change overnight to hopefully make the car more stable, since the more you slide about, the more the tyres wear."
However, the former champion remained upbeat about qualifying, saying: "Red Bull and Ferrari seem to manage the medium tyre better than us, but we should be competitive on the soft compound, even if we don't know what fuel load teams used. It's looking very close at the top, but we'll be fine."