Valtteri Bottas thinks he's doing enough in Formula One to extend his stay with reigning champions Mercedes.
The Finn earned a one-year contract extension after securing three wins and helping Mercedes to a fourth straight constructors' championship in 2017. The short length of his contract extension prompted suggestions Mercedes wasn't entirely convinced by Bottas and it has allowed it to keep its options open, with Red Bull's Daniel Ricciardo on the list of drivers in the final year of their existing deals.
Bottas believes he has shown the speed and level of improvement needed in 2018 to secure a third year with the team.