South Korean tennis star Chung Hyeon has made it to the quarter-finals of the Japan Open.<br />He beat former U.S. Open Champion Marin Cilic by two sets to one in the last sixteen round on Thursday.<br />This was the first time in three attempts that Chung has defeated the former world number three.<br />Chung's quarter-final match against 2017 Tokyo champion David Goffin is taking place as we speak.<br />
