Jos Verstappen, father of reigning Formula 1 World Champion Max Verstappen, has expressed his frustration with Red Bull team principal Christian Horner following comments made in the aftermath of the Singapore Grand Prix.
Red Bull on alert over ‘serious’ Verstappen retirement threat
Red Bull advisor Helmut Marko has warned that Formula 1 and the FIA must take Max Verstappen’s retirement hints seriously, following the reigning world champion's recent comments that suggest his future in the sport could be in doubt.