World champion Fernando Alonso has vowed to remain fully focused on retaining his title with Renault next season, despite his shock move in joining McLaren in 2007.
The Spaniard's decision to switch teams was announced on this morning and comes amid claims that he fancied a new challenge in his career.
"As everybody will now be aware, I have taken the decision to leave Renault after the 2006 season," said Alonso.
"I achieved my lifetime ambition with Renault this year, and for my career, I felt that it was time for a new challenge. That will be to try and win with another team.
"At this point in time, though, I am concentrating on 2006. Renault brought me into Formula One, brought me my first title, and I will be working to repeat that success next year.
"The signs so far are very positive on every level. I am confident the chassis will be quick, and the engine team are doing a fantastic job on the new V8. I am looking forward to a very successful 2006 season."
Alonso joined Renault for testing at Jerez in Spain last week but will not get his first taste of the team's 2006 car and engine until January.