Christian Horner has told Mercedes team principal Toto Wolff that he has to "focus" on Ferrari and Aston Martin, rather than worrying about Red Bull and competing for the championship.
Tensions have always been high between Horner and Wolff, especially following the conclusion of the 2021 world championship.
Red Bull and Max Verstappen have gone on to dominate the sport since that infamous showdown in Abu Dhabi, with the Dutchman now on course to win his third title in as many seasons.