Mercedes boss Toto Wolff says his team needs to be back to its best if it is to win this weekend's Chinese Grand Prix.
Despite having arguably the fastest car in Formula One, Sebastian Vettel has claimed back-to-back victories in 2018. In Australia, Vettel jumped Lewis Hamilton under the Virtual Safety Car period, while in Bahrain, impressive tyre preservation from Vettel meant Valtteri Bottas was given limited opportunities to pass the Ferrari driver in the latter stages of Sunday's race.
Speaking ahead of this weekend's race in Shanghai, Wolff stressed the need to learn from recent races and believes the threat from Ferrari and Red Bull in 2018 means that perfection is required.