Toto Wolff worried by Ferrari progress

Mercedes motorsport boss Toto Wolff has conceded to being a worried man in the wake of Sebastian Vettel’s Malaysian Grand Prix victory.

Suggestions of another season of Mercedes domination in the wake of a comfortable one-two in the season-opening race in Australia were blown apart by Ferrari and Vettel in Malaysia.

As Vettel himself noted, his triumph was achieved “fair and square” as he beat reigning champion Lewis Hamilton by 8.5 seconds, with team-mate Nico Rosberg a further four seconds adrift in third.