First Republic Bank Tiburon Challengerepa03379088 Jack Sock of the US hits a return to Nicolas Almagro of Spain during their match on the sixth day of the 2012 US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 01 September 2012. The US Open runs through Sunday 09 September 2012. EPA/LARRY W. SMITH |