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. The Japanese star out-maneuvered the Norwegian with his variety, striking 32 winners and committing just 14 unforced errors to earn the biggest win of his season.