Jenson Button has thrown three names into the ring. He believes Sebastian Vettel, Charles Leclerc and Max Verstappen all have the ability to bring a strong enough challenge to Mercedes during the 2020 Formula 1 season.
"Both Ferrari drivers will make it difficult for Hamilton. Max is still a very young river, but he already has a lot of experience. He is enormously talented. I think he has the most natural talent in Formula 1," Button said in a conversation with Sky Sports
What about Albon?
According to Button, we should also keep an eye on the other Aston Martin Red Bull Racing driver: Alex Albon. Button wants him to show whether he'll be capable of beating Lewis Hamilton and Valtteri Bottas.
"He has only been involved for one year, so we also have to keep an eye on him. Hopefully, he will show what he is capable of and where his bar is set because I suspect we haven't seen the best of him yet," Button concludes.
The winter test is scheduled for two weeks in Barcelona. The Formula 1 season will then start on 15 March with the Australian Grand Prix.