Korea Open : Yoshihito Nishioka stuns Casper Ruud to reach semifinals
Seoul (South Korea) : Yoshihito Nishioka earned just the second Top-5 win of his career on Friday, when he upset World No. 2 Casper Ruud 6-2, 3-6, 6-2 to reach the semifinals at the Korea Open Tennis Championships, here.
The Japanese…