Former McLaren driver Gerhard Berger has insisted that Fernando Alonso will win his third Formula 1 drivers' title following his return to the team.
The Spaniard, who won two titles while at Renault before joining McLaren for a one-year stint in 2007, will miss the opening race of the 2015 F1 season later this month following a crash in testing.
However, Berger told BBC Sport: "He is a complete driver. He should have more championships because he is a big champion.
"The way that he drives, the killing instinct that he has, he's capable of winning more than two championships. I think once he signed up for McLaren-Honda, he knows there is going to be a learning period. I'm sure that he is going to be part of this learning.
"Once this is done, I'm sure he wants to take all the fruits from the learning period. I don't think it must be an intention to jump around teams. Alonso has some extreme high talent in certain areas, not just in driving skills but in the way he runs the politics."
Alonso finished sixth in the championship last year before ending his five-year spell with Ferrari.