2016 world champion Nico Rosberg, who was partnered with Lewis Hamilton for four seasons, says that if Valtteri Bottas has a good start to the season in 2019 it could upset the five-time world champion's rhythm.
Rosberg believes that Bottas did not show what he was capable of during a difficult 2018 campaign but thinks that the 29-year-old Finn has the necessary talent to "annoy" Hamilton if he has a strong start to the season in Melbourne.
"Valtteri is a lot better than he's been able to show recently. With a new season starting he has a good chance of establishing himself in a stronger position and even really be annoying Lewis quite a lot."
Rosberg pointed out that Bottas had a lot of bad luck last season as well as a series of low key performances, a combination that led to him failing to reach the top step of the podium. His biggest chance of a win, in Russia, was taken away by team orders, helping to secure both of the championships for the team.
Rosberg also added that he was hoping that Hamilton's and Bottas' rivals, in particular, Max Verstappen will give the Mercedes pairing a run for their money: "It's time for renewed battles up front, and then may the best team win. Mercedes has been the best recently. We want it to go down to the wire, we want to see real action."