Carlos Sainz is an option to take up either Red Bull seat in 2025, but people close to the Ferrari driver fear Max Verstappen could block him from replacing Sergio Perez. The 29-year-old is firmly among the hottest items on the market after Ferrari confirmed that Lewis Hamilton will replace Sainz. A chance to sign the seven-time Formula 1 champion was simply too good for the Scuderia to refuse. Sainz was already out of contract after this term. Sainz and Ferrari are now enjoying a farewell tour through 2024 which also saw him win the Australian GP. A brake issue forcing Verstappen to retire in…