During the Belgian Grand Prix, Verstappen collided with Räikkönen at the first corner, pushed Vettel, Räikkönen and Pérez wide at Les Combes, and aggressively blocked Räikkönen on the Kemmel straight. Verstappen was criticised for his driving, with Räikkönen saying that he "was going to cause a huge accident sooner or later"; Verstappen's boss, Horner, said that the driving was "on the edge", and that "Verstappen will learn from Belgium". On 2 September 2016 F1 director Charlie Whiting called in Verstappen for a discussion. Whiting gave Verstappen a gentle warning because of his aggressive driving. However, in October drivers' concerns about Verstappen's defensive tactics led the FIA to disallow moving under braking.