Russell: Bahrain F1 test a 'reality check' as Red Bull leads

Mercedes F1 driver George Russell says his team is behind after Bahrain testing and that Red Bull is the 'team to beat'.

Mercedes had been touted as having a strong engine and running smoothly in Barcelona testing ahead of the new season, fuelling hopes they could be at the front in the new era of regulations.

But Bahrain testing told a different story, with Red Bull racking up impressive mileage and Mercedes lagging behind.