Fernando Alonso has admitted that he is willing to wait for success after rejoining McLaren, but is 'determined' to get results for the team.

The Spaniard was confirmed as the team's new driver for the 2015 season this morning and will partner Jenson Button, who has been retained following much speculation over his future.

Alonso, who raced for McLaren back in 2007, opted to sign for the new-look constructors after spending four years with Ferrari.

"I am joining this project with enormous enthusiasm and determination, knowing that it may require some time to achieve the results we are aiming for, which is no problem for me," said Alonso.

"Over the past year I have received several offers, some of them really tempting, given the current performance of some of the teams that showed interest. But, more than a year ago, McLaren-Honda contacted me and asked me to take part, in a very active way, in the return of their partnership – a partnership that dominated the Formula 1 scene for so long.

"McLaren-Honda's repeated and open desire, perseverance and determination in making it possible for me to join their exciting renewed partnership, have been some of the main factors that made me take this decision, not forgetting the most important factor of all - we share a common objective and expectations, and there is a very solid future, with confidence, ahead."

Kevin Magnussen will remain with McLaren as a reserve and test driver.