Red Bull has pledged not give up on the Formula 1 title fight until it's mathematically impossible for Max Verstappen to win, even after Christian Horner was fired as team principal.

Christian Horner has been fired by Red Bull's Formula 1 team and it only adds to speculation about the future of four-time champion Max Verstappen.

Laurent Mekies, the boss of sister team Racing Bulls, will replace Horner, who has been with the team since its inception in 2005 and led it to 124 wins and numerous championships.