McLaren want Kimi Raikkonen to leave them as a winner before he becomes their main rival with Ferrari next year.
'We've got some further improvements for the last three races and we believe we can win some,' managing director Martin Whitmarsh said after Raikkonen finished second in Sunday's Italian Grand Prix.
'(Kimi) has the support of everyone in the team to get on and get the job done,' he told Reuters. 'We're going to give him absolutely everything to try and win those last three races.'
Ferrari confirmed an open secret on Sunday when they announced that the Finn would be joining them next season as a replacement for retiring seven-times champion Michael Schumacher.
'Losing someone with that level of talent isn't something that any race team wants to do," said Whitmarsh, whose team have 25-year-old world champion Fernando Alonso arriving from Renault.
'But it's not exactly a bolt from the blue. Kimi has made a decision and the team understands and respects it. We've thanked Kimi for everything that he's done so far, we've expressed our pleasure in working with him, and some great achievements.'
Next season will be very different, with Raikkonen in the red car that beat him at Monza on Sunday as Schumacher claimed his 90th win before announcing his retirement .
'Beating Kimi is always going to be tough,' said Whitmarsh, whose team have yet to win this year and risk ending the season empty-handed for the first time in a decade.
'I hope and believe that we will continue to have a strong and positive relationship out of the car, and in the car we'll try to beat him.
'Kimi is a formidable competitor and a great driver. He's a winner - he wants to win the last three races, so do we, so we are totally aligned in that regard.'
Raikkonen has spent five seasons at McLaren, finishing championship runner-up in 2003 and 2005. He has won nine times with the Mercedes-powered team.
