According to the former World Champion Jacques Villeneuve, Lewis Hamilton may not start and finish the 2019 Formula One season with the same team-mate.
Villeneuve has tipped young Mercedes driver Esteban Ocon, who is without a seat for next year, to get the nod.
"I think there is a possibility that Bottas will be replaced by Esteban Ocon during the 2019 season," Villeneuve told Sky Italia.
Ocon will spend 2019 as the third and reserve driver for Mercedes after his contract with Force India expired.