Yoshihito Nishioka produced an impressive display to shock Denis Shapovalov in the Korea Open final and win his first ATP Tour title in four years.
The Japanese player earned a 6-4 7-6 (7-5) triumph in a competitive contest against fourth seed Shapovalov on Sunday that lasted just under two hours.
Victory gave Nishioka his first trophy since the Shenzhen Open in 2018 and capped a memorable week that also saw him defeat top seed Casper Ruud at the ATP 250 event in Seoul.
Nishioka took a big step towards the second title of his career by breaking Shapovalov at a crucial moment when he was 5-4 up in the opener, both players having earlier saved break points.
His Canadian opponent was in the ascendancy after claiming an early break in the second set but Nishioka fought back from 3-1 down to force a tie-break and then won four of the first five points in the breaker.
Despite Shapovalov reducing the deficit, he was consigned to defeat when he sent a forehand wide, Nishioka dropping to his knees in delight after converting his second match point.
Shapovalov, a Wimbledon semi-finalist last year, has now lost in four consecutive ATP final appearances and still has just one career title to his name.