World Formula One champion Sebastian Vettel put Red Bull on top on day two of the final pre-season test in Barcelona.
Vettel set the standard with the fastest time seen so far in testing at the Catalunya circuit, almost a second and a half quicker than Sebastien Buemi in a Toro Rosso and Vitaly Petrov in a renault.
McLaren's Lewis Hamilton was fourth after reliability issues confined him to spells in the garage.
