While the reason for Horner's ousting has not been revealed, Red Bull senior advisor Helmut Marko has pointed out that performance concerns led to his exit, and that the decision was taken by the managing director of Red Bull GmbH, Oliver Mintzlaff. Newsweek Sports reported his comments:

Christian Horner has swapped Formula 1 speed for four-legged horsepower in a cheeky new Instagram post, days after his shock exit as Red Bull Racing team

Red Bull Racing’s decision to sack team principal Christian Horner sent shockwaves through the sport of F1, and just over two weeks on the fallout is still continuing. On Tuesday July 9, the news broke that the all-conquering Horner was being moved out of the team he loved after a glorious 20-year run which delivered four consecutive drivers’