At the end of day 8 at 2015 US open, the quarterfinal line-up was decided in most categories. After Rafael Nadal fell on day 5, the 2012 US Champion Andy Murray also exited the US open on September 7. However, top two men’s seeds Novak Djokovic and Roger Federer have reached the quarterfinals and they have been joined in the round-of-eight by Stan Wawrinka, defending champion Marin Cilic, Jo Wilfried Tsonga, Feliciano Lopez, Richard Gasquet and Kevin Anderson, who caused the biggest upset of the day. Anderson defeated no.3 seed Andy Murray in a 4-setter that extended