The three-time race winner is also believed to have rejected an offer from Audi - who will make their F1 debut in 2026 - as he targets a spot at a more established outfit.
“But playing the waiting game you could find out you are the last one standing and the last one standing is not a positive here.
"At some point, you are bound to annoy other teams who have made you amazing offers. He seemed certain to be joining Williams, and then something happened.
“When you get a good offer and delay and delay at some point you will p*** people off and they won’t want him.
"You end up signing very late and you make it obvious to that team that they were only your third choice - that is not the best thing to do either."