David Coulthard has warned Ferrari's rivals to expect an even better Fernando Alonso next season as Kimi Raikkonen will force him to raise his game.
On Wednesday, Ferrari confirmed that Raikkonen would be rejoining Ferrari to partner Alonso in next year's Championship.
While the move has been applauded by some, others have raised concerns that two 'number one' drivers could prove to be more than Ferrari can handle.
"In years to come will Ferrari's rehiring of Kimi Raikkonen be remembered as a triumph, a bold move that heralded a return to former glories?" Coulthard asked in his column for the Daily Telegraph.
"Or will it be remembered as a disaster, a relationship that ended in tears for a second time in the space of a few seasons? I cannot say for certain but it is going to be fascinating finding out."
In fact, the former driver reckons Ferrari's rivals should be wary because he believes having Raikkonen at the team will push Alonso to another level.
"In my opinion," he added, "Fernando is the complete driver and will raise his game with Kimi there for the next two seasons, which is a worry for everyone else."
As for either driver throwing their toys should they be beaten by their team-mate, the Scot feels both Raikkonen and Alonso will handle the challenge thrown at them.
"One thing I do know, having worked with Kimi, is that what you see is very much what you get. He is cool, unflappable and completely apolitical. He just does not get involved in all of the paddock conspiracy stuff.
"Like Felipe Massa at the moment, Kimi will get on with the job at hand and not rock the boat. He did not rock the boat in 2008 and 2009 when Felipe started to get on top of him.
"The question is will Fernando Alonso rock the boat if Kimi starts to push him close, or even beat him? I don't think so.
"A lot of people refer back to Fernando's time at McLaren in 2007, and cite that season as proof that he is liable to throw his toys out of the pram if he does not get his way.
"I disagree. I believe Fernando lost his cool because he felt destabilised and betrayed by the fact that McLaren did not deliver on promises made, rather than because a rookie Lewis Hamilton was challenging him."