He made his grand prix debut at the end of last year in order to prepare for 2025, stepping in for Esteban Ocon at the season-ending Abu Dhabi Grand Prix.
Doohan will partner experienced race winner Pierre Gasly at the Enstone outfit this season, as the team hope to build on their impressive turnaround to secure sixth place in the constructors' championship in 2024.
Pierre Gasly and Jack Doohan are Alpine's 2025 driver pairingFranco Colapinto has signed with Alpine as a reserve driver in 2025
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However, a huge development during the F1 winter break has changed the feel-good factor surrounding rookie Doohan and Alpine.
Colapinto played a starring role for Williams in 2024, racing in nine grands prix after replacing Logan Sargeant, and scoring five of the team's overall tally of 17 points.
Alpine executive advisor Flavio Briatore has already suggested that both Doohan and Gasly are under pressure to perform immediately in 2025, with Doohan in particular needing to hit the ground running or risk facing a threat from Colapinto.
Now, speaking ahead of the live F175 event, Doohan provided a rather spiky response to questions about the looming presence of Colapinto, suggesting he has been given assurances about the young Argentine's role.
"I’ve been told he’s a reserve driver," the Australian told media.
"I think regardless, you’re one of 20 Formula 1 drivers in the world, and I know that when I was a go-karter, Formula 3, Formula 2, I would do anything to be in Formula 1 and sacrifice everything.
"You’re always going to have pressure on your shoulders because you’re in such a cut-throat sport. Whatever pressure there may be, I look forward to enjoying that, embracing it and just enjoying my season.
"I was a 21-year-old reserve driver last year on a long-term contract," he continued.
"No, I don’t (feel undermined). Maybe I should. I don’t really understand the question."