Claire Williams says she wants Valtteri Bottas to keep progressing and start challenging for wins with Williams following the confirmation he will stay for a fourth consecutive season in 2016.

The Finn was strongly linked with Ferrari to potentially replace Kimi Raikkonen at Ferrari next year, but the recent confirmation that it will retain the 2007 champion meant Bottas was always expected to stay with the team he made his F1 debut in 2013.

Ahead of the Italian Grand Prix, Williams has now officially confirmed Bottas and Felipe Massa will form an unchanged driver line-up for next season.

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However, with 2016 set to become Bottas' fourth season with the team, though Williams is delighted he is remaining given Ferrari's interest, she now wants to see him progress to the top step of the podium.

"I'm really happy with him and the whole team is and we've always said from the very beginning, from any of these conversations that have gone on, that it's flattering for a driver to be looked at by a team like Ferrari but also, that we've always wanted to keep him," she told

"Ever since he joined the team, he has been a critical part of this overturn of the team and so losing him would have been really disappointing for us. I'm really pleased he is staying with us; it's what we wanted all along. He's done a great job, as he's always done for us this year, the podium in Austria and he's a fundamental part of the development of the car.

"He has great relationships, he gets on with everybody, and so I'm really pleased. I would like for him to now move forward and get some more podiums in the latter part of the season and to hopefully get his first race win for us."