Since, Sainz has taken a patient approach to his future, though he appears to be out of options when it comes to a drive at the front of the grid.
Williams have emerged as the favourites to obtain Sainz's services, but the three-time race winner insists that he has not yet made a final decision.
Where will Sainz go in 2025? Who else are Williams in for?
Williams team principal James Vowles has signalled his intent to land Sainz, and described how he has sold the Williams project to a driver who would have to adjust from fighting for wins to scrapping for the top ten.
Williams have just two points in 2024, both scored by lead driver Alex Albon. Team-mate Logan Sargeant, meanwhile, is due to make way for a new driver after failing to impress in his season-and-a-half so far at the Grove-based team.
Now, Blick report that Felipe Drugovich is the lead candidate to take the American's seat should the Sainz deal fall through.
Stake F1 Team driver Valtteri Bottas is also reported to have a shot at the Williams drive, but it is Aston Martin reserve driver Drugovich who is favourite should Sainz not sign the contract.
Drugovich stormed to the F2 title in 2022 - Sargeant himself finished fourth - but has since been waiting in the wings at Aston Martin.