Having brushed aside some of the biggest names in the sport already,... Korea's up-and-coming tennis star Chung Hyeon faces the biggest moment of his life today: an Australian Open semi-final against the man widely considered to be the greatest player in history: Roger Federer.<br /> The 21 year-old Korean is ranked 58th in the world and Federer is currently world number two.<br />Federer has a staggering 19 Grand Slam titles under his belt,... including five Australian Open titles.<br />The match comes as Korea is in the grips of the "Chung Hyeon fever" with the nation seeing a huge jump in sales of tennis goods.<br />The semi-final will start at 5:30PM, Korea time, on Friday.<br />The winner will play Croatian Marin Cilic (chee-leech) in Sunday's final. <br />
