US Open: Djokovic-Murray

MADRID, SPAIN - MAY 05: Tennis players including Novak Djokovic, Andy Murray, Roger Federer, Rafael Nadal and Serena Williams (out of frame) observe a moment of silence for Brad Drewett during day two of the Mutua Madrid Open tennis tournament at the Caja Magica on May 5, 2013 in Madrid, Spain. He was a former tour player who led the ATP as executive chairman and president since January 2012, died Friday after a battle with motor neurone ... allarga 

MADRID, SPAIN - MAY 05: Tennis players including Novak Djokovic, Andy Murray, Roger Federer, Rafael Nadal and Serena Williams (out of frame) observe a moment of silence for Brad Drewett during day two of the Mutua Madrid Open tennis tournament at the Caja Magica on May 5, 2013 in Madrid, Spain. He was a former tour player who led the ATP as executive chairman and president since January 2012, died Friday after a battle with motor neurone disease. He was 54. (Photo by Julian Finney/Getty Images) riduci