In May 2009, the 50th World Table Tennis Championships was held in Yokohama, Japan. There were 128 men's singles participants, and all of them adopted the elimination system. In the end, Wang Hao of the Chinese team won the championship. How many games did he win?
2009年5月，第50届世乒赛在日本的横滨举行，男子单打有128人参加，全部采用淘汰制，最终中国队的王皓夺冠，他赢了多少场比赛．
<result>7</result>