Mercedes admits F1 upgrade ‘rush’ prompted some worries

The German manufacturer produced a notable step forward in form at the Spanish Grand Prix, as Lewis Hamilton and George Russell finished second and third behind race-winner Max Verstappen. 
The potential of its revamped car, which features new sidepods, front suspension and floor, is clear to see, as the squad targets making further steps to try to close the gap to Red Bull. 
But …Keep reading