Sainz has recorded Ferrari's only win of the season so far, which came at the Australian Grand Prix on his return from surgery on his appendix.
Having impressed despite the news he would be making way for Hamilton, Sainz has had no shortage of interest, but is still to land a seat for 2025 and beyond.
Sainz 'hesitating' amid deadline
According to F1-insider.com, Audi - who will take full control of the Sauber team for the 2026 regulation changes - have set Sainz a deadline of the Monaco Grand Prix (24-26 May) to accept an offer.
The team recently announced that Nico Hulkenberg would be in one of their seats from 2025, which sees the German driver join forces with the manufacturer from the same country.
Reportedly, one reason for Sainz's hesitation regarding the Audi project is that Mercedes have offered him a contract for 2025, but it is only a one-year deal.
Wherever the three-time race winner ends up he will be a valuable asset, but the clock is ticking for the 29-year-old to make his decision.