Christian Horner and the rest of the Red Bull leadership are deciding whether to replace Sergio Perez. The Mexican may have just two races to save his seat. Remarkably, it was only in the first week of June that Perez signed a new two-year deal. But Horner and co. have become increasingly concerned by his ongoing struggles. Red Bull were at least prepared for this eventuality. They negotiated break clauses into the contract, even if they perhaps didn’t expect them to become relevant until 2025. If Perez remains more than 100 points behind Verstappen by the summer break, the team are reportedly…