Fourth seed Yuki came back from behind to overcame the home boy 3-6 6-0 7-6(3) in a gruelling two-hour contest.
It was Yuki's fourth Challenger level title.
"I am hitting well and moving very well. I was able to fight back after losing the first set. Then I had a ton of match points but could not convert so had to keep composure and reset at 5-5," Yuki said
Yuki lost his serve twice but managed to break his rival four times in the match.