Fernando Alonso formally began preparations for his Formula 1 comeback with Renault next year by returning to the team's Enstone factory.
The two-time world champion has re-signed for the team he drove for across two stints in the 2000s - winning both his titles and claiming the majority of his victories - after two seasons competing elsewhere in motorsport.
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"An incredible thrill to go back to the factory," tweeted Alonso. "I came to Renault in 2002, when I was 21-years-old, I know every corner of this place, every corridor, every door.
"It has been a very special day. We [have] started."
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Renault say the 39-year-old met with the team's engineers to look ahead to 2021, while the visit would have been Alonso's first look at the team's redeveloped UK base.
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Although wearing the team's current yellow colours, Alonso's return to Enstone will coincide with their rebranding as Alpine - when they will also take on the Renault-owned sportscar maker's French blue colours.
Alonso is replacing Daniel Ricciardo, who is leaving for McLaren, next to Esteban Ocon.