South Korea's Lim Jong-hoon stunned third seed and 2012 winner Xu Xin of China as main draw action began at the International Table Tennis Federation (ITTF) China Open in Shenzhen.
Lim, fresh from his triumph at the ITTF Challenge Polish Open earlier this year, claimed a shock 11-7, 9-11, 11-6, 11-7, 11-6 win to progress to the second round at the Sports Center Gymnasium.
The South Korean player, a semi-finalist at the recent Hong Kong Open, said it was an "honour" to beat one of his idols.
"It’s a great pleasure and honour to win," he said.
"Xu Xin wasn’t in his best state today; he did not control the play well and I took my chances.
"I like Xu Xin and have learned a lot from him.
"I started to watch his matches on video when I was around 15 years old."
Lim's triumph came on a successful day for South Korea as Jang Woo-jin dispatched 14th seed Marcos Freitas of Portugal 11-6, 12-14, 11-3, 11-6, 11-7.
Top seed Fan Zhendong of China, the current world number one and World Championships silver medallist, had no such worries as he battled to a 5-11, 11-5, 11-2, 13-11, 9-11, 11-8 victory over Jeoung Young-sik of South Korea.
Wong Chun Ting, the sixth seed from Hong Kong, is also through as he battled from two games down to oust Austria’s Robert Gardos 7-11, 8-11, 11-9, 11-6, 11-7, 11-7.
Former world number one Zhu Yuling of China was among the winners in the first round of the women's singles event.
Zhu booked her place in round two with a 11-4, 11-6, 6-11, 11-8, 11-7 win against Minami Ando of Japan.
Jeon Ji-hee of South Korea also progressed as she beat Cheng I-Ching of Chinese Taipei 14-12, 7-11, 6-11, 11-9, 11-9, 8-11, 17-15 in a marathon contest.