Ex-Red Bull racer Sebastian Vettel is not ruling out a return to his old team to fill the shoes left by Helmut Marko when he eventually retires

Sebastian Vettel is a four-time Formula 1 world champion, having won all of his titles with Red Bull, and has been linked with a return to the team in recent weeks

D efending F1 world champion Max Verstappen has opened up on the prospect of Red Bull legend Sebastian Vettel making a return to the team. The German won four consecutive drivers' titles during a dominant spell with the Milton Keynes-based outfit between 2010 and 2013, before going on to drive for Ferrari and Aston Martin.