Sebastian Vettel will not sign a new contract with Aston Martin and will end his Formula 1 career after this season.

The 35-year-old four-time world champion announced this on Thursday in the run-up to the Hungarian Grand Prix.

Vettel's contract with Aston Martin expires at the end of the season, and his future has been discussed for some time.

Vettel won his four titles with Red Bull from 2010 to 2013.

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