Pierre Gasly says he has unfinished business with Red Bull, having not been given a proper chance to prove himself this year.
The Frenchman finished outside of the top six in five of his 12 races at Red Bull, married to a pair of DNFs, in a difficult start to the campaign after promotion from Toro Rosso.
Red Bull acted over the summer break, swapping Gasly with Alexander Albon, who has finished fifth, sixth and sixth in his races since promotion.
Dr Helmut Marko said in Singapore that Gasly remains under consideration for Red Bull in 2020, although Albon's solid start may well play more to his favour, despite the Frenchman's determination to put things right.
He said: "I think I'm a positive person in general. I'm also not someone that will give up easily.
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