With Rio Olympics around the corner, there are nine players in the Top 25 has announced that they will not be participating in the Olympic Games.  With the U.S Open staging on 29 Aug, most players are gaming for the big games in USA rather than Rio. Roger Federer will not be representing Switzerland for Rio games in order to rehabilitate the knee that undergone surgery this year.  Of course, Rafael Nadal will be representing Spain to game for the Gold medalist for tennis.