Following the 2007 European Grand Prix, at the Nürburgring in Germany, it was alleged that Tost assaulted driver Scott Speed over an incident on the track. After Tost later denied the incident, Speed went to the press describing the acrimonious situation at the team, stating that "after coming out and denying this stuff, it's just another very dishonest thing that Franz or Gerhard have said in the media to damage me and Tonio". Speed also stated that he did not want to race for Tost and Berger again. He retained the role of team principal when Toro Rosso were re-christened as AlphaTauri at the beginning of the 2020 season.