Lewis Hamilton on Thursday said he is not worried about the laptime put in by Ferrari's Sebastian Vettel at the final Barcelona test.
Vettel smashed the circuit record, but it is believed the German was in a qualifying simulation with the very softest Pirelli 'hypersoft' tyre.
In contrast, Mercedes did not even order a single set of the softest tyres for testing.
Engineer Andy Shovlin said: "We wouldn't learn much about it in these temperatures."
World champion Hamilton said: "I don't know if that's a good time or not and I don't really care. It's testing.
"For us we've not been on low fuel yet so I have no idea where the car can go. I hope it (Vettel's time) is good which means we have a race on our hands."
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