sentences:  As a result, the prize money for the 2013 tournament was US$33.6 million, a record US$8.1 million increase from 2012.The champions of the 2013 US Open Series also had the opportunity to add US$2.6 million in bonus prize money, potentially bringing the total 2013 US Open purse to more than US$36 million.In 2014, the prize money was US$38.3 million.