It will be the second consecutive Rolex for Alonso, who retired last weekend from F1. The Spaniard raced last year with United Autosport in the LMP2 class and finished 13th after a mechanical issue. He was part of the winning 24 Hours of Le Mans team in June.
Alonso already announced a return in May to the Indianapolis 500 as he seeks to win all the top races in the world.
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