Sebastian Vettel has put Red Bull's huge Friday practice advantage at the Mexican Grand Prix down to the way in which the cars are using their tyres.
Vettel could only manage the fourth fastest time in second practice and finished the session 1.234s off the fastest time set by Max Verstappen's Red Bull. The result was a reversal of the majority of Friday practice sessions this season, in which Mercedes and Ferrari have usually held a significant single-lap advantage over Red Bull.
Mexico City's 2,250 metre altitude is believed to be the main factor upsetting the order this weekend.