Red Bull boss Christian Horner puts Sebastian Vettel's error-strewn recent past down to the intense expectations that come with racing for Ferrari.
Vettel has made a string of high-profile errors over the past year, triggered by his infamous crash out of the lead of the German Grand Prix last July. Those mistakes ultimately cost him the shot of beating Lewis Hamilton to a fifth world championship.
Those have continued in 2019, with two errors while under pressure from Hamilton -- he spun while fighting the Mercedes driver in Bahrain and then ran wide while defending the lead at the Canadian Grand Prix two weeks ago.