For , McLaren ended their engine deal with Mercedes which included buying back the 40% stake that Mercedes held in the team and reforged their historical partnership with Honda. After a prolonged period, the team announced Fernando Alonso and Jenson Button as their race drivers, with Kevin Magnussen demoted to test driver. During pre-season testing at the Circuit de Barcelona-Catalunya in February, Alonso suffered a concussion and, as a result, Kevin Magnussen replaced him for the season opening in March. At that inaugural race of the season, Jenson Button finished 11th, but was lapped twice and finished last of the finishing cars. Following considerable unreliability and initial suggestions that the Honda engine was underpowered relative to its competitors, steady performance gains eventually resulted in Button managing to score the team's first (four) points of the season at the sixth round in Monaco. By contrast, Alonso scored his first point a further three races later at the British Grand Prix.