Horner: Perez F1 form shows promoting Gasly, Albon so soon was "perhaps unfair"

Former Red Bull junior Gasly was promoted from Toro Rosso to Red Bull in 2019 after just one full season with the Faenza squad.

But as the team's cars were developed around Max Verstappen's driving style, Gasly struggled to find his groove and he was demoted back to the sister team during the summer break.

Toro Rosso's Albon replaced Gasly, but the Thai driver had even less experience after just 12 grands prix for the B-team and equally struggled to gain a foothold, being replaced at the end of 2020.

Red Bull brought in the much more experienced Perez for 2021, but he too found life hard alongside Verstappen initially before showing improved form last year.

While the Mexican's three wins and one pole in two seasons pale in comparison to Verstappen, Red Bull has at least found a reliable pair of hands that has helped it bank points and finally dethrone Mercedes as the constructors' world champions.

But the benefit of having the 33-year-old's experience in the team has also shown Horner that in hindsight it was probably too early to bring in Gasly and Albon into such a high-pressure environment.

"The key thing in the appointment of Checo was his experience and it had been unfair, perhaps, on the previous two guys to bring them in so soon," Horner said.

"Checo with that experience, he's been through some of the hard knocks with his career to that point and I think what he's brought to us is he's a very rounded guy, he's a great team player.

"He's got a good outlook on the development of the car and he's very easy to work with. That's what all the reasons were for taking him in the first place and he's delivering on that."