Martin Whitmarsh admits McLaren don't know if Sergio Perez is a potential title winner
McLaren boss says there is no way of knowing how good Mexican is
Wednesday 7 November 2012 16:25, UK
Martin Whitmarsh has conceded that McLaren have no way of knowing if Sergio Perez is title-winning material and the Mexican doesn't 'understand' the pressure he will have to burden next season.
