With his win in Australia, Carlos Sainz has considerably boosted his market value. Of all the F1 drivers without a contract for 2025, the Spaniard from Ferrari appears to be the highest-quality free agent. Meanwhile, Sainz is already being linked to Mercedes and Aston Martin, while it has long been clear that Audi sees him as the team's future leader. Red Bull Racing is also mentioned as a possible destination, but Sainz is unlikely to opt for the Austrians. Here's why.