• Montoya says Vettel should consider quitting F1
• Vettel does not have a passion for racing - Montoya
• Vettel teaming up with Hamilton will be 'spectacular'
Former Formula 1 driver, Juan Pablo Montoya, believes there are just two options for Sebastian Vettel: To sit in a Mercedes or to sit on the couch.
Vettel announced last month that he would be leaving Ferrari at the end of this season, with the two parties declaring there is no longer a "common desire" to work together.
What he will do in 2021 is not yet known.
Vettel has been linked to a move to Mercedes with fans and pundits alike keen to see him take on Lewis Hamilton machinery. However, if that doesn't happen, Montoya reckons the four-time World Champion could walk away from motorsport altogether.
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Sebastian Vettel. Image: Andrej Isakovic / AFP
Racing not his passion
Although the last World Champ to quit F1, Fernando Alonso, has tried his hand at several other series, Montoya doesn't think just racing is Vettel's passion.
He told Motorsport.com: "For me, in his position, it is either going home or to Mercedes. It all depends on how much love he still has for motorsport. Because look, when a person like Fernando… he is like me, he likes to run. Fernando, whatever they put him in, if it has an engine, he's going to run. And so am I.
"Vettel, one does not know how much passion he has for motor racing in general or just F1."
The Colombian feels Vettel could be "spectacular" for Mercedes, especially when teamed up with Hamilton.
The right nationality for the team, Vettel's arrival - should it happen - would mean the end for Valtteri Bottas, who joined the team at the start of 2017. Bottas, though, has never been a fixture at Mercedes, only ever handed one-year contracts.
Montoya says: "One thing that Vettel has with Mercedes is very good that he is German. If you look at the last years, they have always doubted to affirm Bottas. Or at least what they want from Bottas, I don't know if he has never been what they want or what it is, but if you look at Bottas it is always a year (contract) and then it is very difficult to grow when there is no stability.
"When you are thinking that they are going to throw you out all day, it is very difficult to drive fast. It depends on what Mercedes wants to do. Having Vettel and Hamilton in the same team would be spectacular for Mercedes."