Hamilton and Rosberg locked out the front row once again at the Spanish Grand Prix, with Hamilton taking his third pole of the season. On the first lap of the race, Rosberg had a slightly better start and overtook Hamilton on the outside of Turn 1. On the run down to Turn 4, Rosberg realized he was on the wrong engine mode which caused him to slow down and he quickly corrected it, Hamilton, at the same time, seeing a gap, rapidly closed on Rosberg and made an overtaking maneuver. Rosberg immediately closed the gap but it was too late, Hamilton was pushed into the grass, spun at high speed and collided with Rosberg sending both of them into the gravel trap leading to Mercedes' first double retirement since the 2011 Australian Grand Prix, thus ending any hope of a perfect season.