Switzerland's Roger Fedrerer, left, Spain's Rafael Nadal, centre, and Britain's Andy Murray, right,  listen during a media briefing in Westminster, London Friday Nov. 20 2009. The ATP World Tour Finals start at the O2 Arena in London, Sunday Nov. 22, 2009. AP Photo logo AP Photo 2 months ago

Switzerland's Roger Fedrerer, left, Spain's Rafael Nadal, centre, and Britain's Andy Murray, right, listen during a media briefing in Westminster, London Friday Nov. 20 2009. The ATP World Tour Finals start at the O2 Arena in London, Sunday Nov. 22, 2009.