The two-time world champion then rejoined the team in 2015, racing with them for four seasons before retiring in 2018 and being replaced by Lando Norris.
Alonso made a stunning return to the F1 grid in 2021 and, at the age of 43, is still going strong with his Aston Martin team, recently signing a new long-term contract.
Away from the track, Alonso also runs a management agency, A14 Management, and is beginning to help young racing drivers find better opportunities.
One of his clients includes Brazilian youngster Gabriel Bortoleto, a 19-year-old who is currently racing in F2 for Invicta Racing, where he is sat in second in the championship.
The team will be transformed into Audi in 2026, meaning the 2025 season may be seen as a trial-and-error year for the Hinwil-based outfit.
Now, it has been reported by Last Word on Sports that Alonso is actively involved in the negotiation process between Bortoleto and Sauber, with his management agency supporting the young stars career.
They suggest that the Spaniard was seen meeting in the Sauber motorhome during the Belgian Grand Prix weekend, but no official deals have been announced yet by any of the parties involved.