The 30-year-old eventually ended up signing a long-term contract with Williams in a surprise decision, and he will partner Alex Albon as the Grove outfit look to fight further up the grid, particularly when new regulations sweep into the sport in 2026.
With a star-studded driver lineup, the pressure is now on Williams to provide their drivers with a points-scoring car, having only managed to finish ninth in the constructors' standings in 2024.
Carlos Sainz and Alex Albon make up Williams' 2025 driver lineupCarlos Sainz has already made his debut with Williams
To shop official Williams merchandise, click here to browse a variety of team pieces via F1 fanatics.
Sainz's hilarious interview mishap
Now, ahead of the 2025 season, Sainz has been involved in a bizarre interview. The Spaniard was present at F1's 75th anniversary live show earlier this week, as all 10 teams' liveries were unveiled.
As well as the media furore at the event, Sainz had made an earlier appearance on a hit podcast, talking about his expectations for the 2025 season.
Sainz joined the Fast and the Curious podcast, alongside Albon and 2009 champion Jenson Button, who has been confirmed as an ambassador for the Grove-based outfit.
However, Sainz's interview featured a hilarious moment, when the team truck that the interview was being conducted in began to move, with Sainz and the presenters all looking slightly concerned.
"We're moving," host Betty Glover proclaimed. "Do they know we're in here? We've got a driver with us."
A cool, calm and collected Sainz simply said: "I need to catch a plane! Anyway, let's continue like that didn't happen."