Harimoto from Japan had to be at his best against his world number 111 Chinese rival but eventually ground him down to win 11-6, 12-14, 11-5, 13-11, 13-15, 11-4 at Arena Asarel.

Zhao knocked out second seed Dimitrij Ovtcharov from Germany in the quarter-finals yesterday and he cruised past Nigeria's Quadri Aruna in the last four.

The Chinese kept his head against his higher-ranked opponent to record a 11-6, 12-14, 11-2, 11-8, 12-10 victory.

Harimoto enjoyed an 11-8, 11-9, 11-8, 11-4 last four win against Portugal's Marcos Freitas to reach the final.

Chen Xingtong won the all-Chinese women's final 11-4, 7-11,12-10, 11-6, 11-4 against He Zhoujia.

Fifth seed Xingtong reached the final by edging out Japanese second seed Mima Ito in a thriller.

A topsy-turvy clash saw Xingtong trail 3-2 but she kept her nerve to set up a final showdown with He by clinching the final two sets for a 6-11, 11-4, 11-7, 9-11, 9-11, 11-6, 11-7 victory.

The 11th seed Zhoujia defeated compatriot Wu Yang 11-9, 11-8, 11-8, 13-15, 3-11, 11-8 in the last four.