Formula 1: Montoya rocks boat at Williams

Juan Pablo Montoya's rocky relationship with Ralf Schumacher has taken yet another twist as the Colombian is refusing to help his Williams team-mate clinch the runners-up spot in the drivers' championship.

Since Montoya joined Williams at the start of the season he and Schumacher have hardly become the best of friends, with the latter doing little for team harmony following his triumph in his home grand prix in Germany three weeks ago.