Saturday, 1 November Formula 1 boss Bernie Ecclestone says the sport's escalating financial crisis could lead to a reduced grid of 14 cars in 2015. Lotus have denied reports suggesting they could boycott this weekend's United States Grand Prix in protest at F1's financial crisis. Jenson Button's manager, Richard Goddard, says his client is a "wanted individual" and that he has been inundated with phone calls inquiring about the availability of the 2009 world champion. Button says he is against three-car teams in Formula 1, stating that it would "lock out the podium" if one team dominates as Mercedes have done this season. Button is considering a switch to the world endurance championship should he fail to land a competitive Formula 1 seat for next season. Sources say the McLaren driver, 34, has had talks with Porsche, for whom former F1 racer Mark Webber drives. Staff working at the Caterham F1 team site in Oxfordshire have been locked out of the firm's premises, the administrator has said. French driver Romain Grosjean has revealed there is a performance clause in his Lotus deal that would allow him to leave the team. Lotus have unveiled the experimental wedge-shaped nose they will test during practice at this weekend's race.