 Complete the following phrase:  After suffering broken ribs and a pneumothorax injury as a result of an accident during the , Ferdo Alonso was ruled out of the Bahrain Grand Prix as a precaution after medical exams. McLaren reserve driver and reigning GP2 Series champion Stoffel Vandoorne made his Formula One debut, replacing Alonso. Alonso returned to his seat for the Chinese Grand Prix two weeks later. Daniil Kvyat and Max Verstappen traded places ahead of the Spanish Grand Prix, with Verstappen promoted to Red Bull Racing and Kvyat returning to Scuderia Toro Rosso. Red Bull explained the decision to swap their drivers as being made to relieve pressure on Kvyat following criticism for his role in a first-lap accident in the 