Djokovic, Nadal and Phil Collins kick-off US Open

Novak Djokovic and Rafael Nadal get their US Open campaigns under way Monday in the shadow of Arthur Ashe Stadium's spectacular $150 million retractable roof and alongside rock music legend Phil Collins. Defending champion Djokovic and fellow two-time winner Nadal come into the season's final Grand Slam with injury concerns. World number one Djokovic, the 2011 and 2015 champion, admits he is "not 100 percent" after suffering a wrist injury on the eve of the Olympic Games where he was a shock fir