Korean tennis sensation Chung Hyeon continues to edge his way up the world rankings,... rising one spot to 21st.<br /> The 22-year-old, who made it to the last four of the BMW Open in Germany last weekend,.. had been ranked world number 22 for the past five weeks.<br />Chung came to the world's attention earlier this year following his spectacular run to the semifinals of the Australian Open. <br />
