Sports 2011 US Open - Day 1 August 30, 2011 / 10:55 AM EDT / CBS News (Getty Images) 2011 US Open - Day 1 (Getty Images) 2011 US Open - Day 1 Number seven seed Gael Monfils of France 2011 US Open - Day 1 2011 US Open - Day 1 2011 US Open - Day 1 (Getty Images) 2011 US Open - Day 1 Grigor Dimitrov of Bulgaria falls as he 2011 US Open - Day 1 Swiss tennis player Roger Federer return 2011 US Open - Day 1 2011 US Open Opening Night Ceremony (Getty Images) Venus Williams (credit: EMMANUEL DUNAND/AFP/Getty Images) Maria Sharapova of Russia (3) against He Maria Sharapova of Russia (3) hits again