Washington: Japan’s Yoshihito Nishioka stunned Horacio Zeballos 6-4, 6-4 to reach his maiden ATP Tour semi-final at the Atlanta Open tennis tournament here.
 
Nishioka did not drop a serve as he posted his most dominant victory so far in a week that also saw him oust fourth seeded Alexandr Dolgopolov on Friday, reports Xinhua.
 
He will face second seeded Aussie Nick Kyrgios who won a tight match against fifth seed Fernando Verdasco 6-4, 6-7 (7/5), 6-3.
 
“I’ve been working on my serve a lot. More percentage, more power,” said Nishioka.