Sports 2011 US Open - Day 4 September 2, 2011 / 10:39 AM EDT / CBS News 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4 2011 US Open - Day 4