Valtteri Bottas's sponsor, Wihuri's boss Antti Aarnio-Wihuri, says Fin Pilot could pass to Ferrari in 2019.
Valtteri Bottas stepped into Formula 1 with Williams in 2013, moved to Mercedes in 2017 and won three wins in his first year.
The contract for the Fin pilots ends at the end of 2018 and claims that Mercedes is interested in Daniel Ricciardo and Esteban Ocon for the place of the Fin pilots.
Bottas said he wanted to stay in the team this year with a good performance.
Antti Aarnio-Wihuri, the Fin Pilot's sponsor Wihuri's boss, said that Ferrari could also be included among the options.
Aarnio Whiuri, "Valtteri is likely to continue with the Mercedes, but we know that everything can happen in Formula 1."
"I think that Kimi Raikkonen is running out of time in Formula 1. We saw how inconsistent the ride was last year, and the interest in the spore has probably begun to diminish."
"I have heard of the Ferrari rumors, and it is possible that Valtteri's passing to Ferrari."
"Every Formula 1 pilot over here dreams of driving for Ferrari at one point." said.
As Kimi Raikkonen's contract expires at the end of the season, Ferrari is thought to be interested in Daniel Ricciardo, just like Mercedes.