Rajiv Ouseph, the 2014 European Championship silver medallist in the men's badminton singles, pulled off a shock by edging out seventh seed Tommy Sugiarto to reach the quarter-finals.
The Londoner, 29, reeled off nine points in a row to take the first game before his Indonesian opponent pulled level to take the clash to a decider.
Thirteenth seed Ouseph prevailed in a tense 25-minute game to seal a 21-13 14-21 21-16 success and set up a clash with Denmark's Viktor Axelsen, seeded fourth, in the last eight.
He said: “It was very tense but I thought this could be my last match here so I just wanted to give it everything out there and it worked well.
“I am just thinking one match at a time and when it came down to this one, I just tried my hardest and fortunately it paid off for me tonight. I had a poor start but managed to come back well in the first set which calmed me down.
“It gave me a buffer for that second set where I didn’t play so well but I manged to come back strongly in the third so I am really happy. As I get older, I learn more about my game all the time and I try and play to my strengths.
“The coaches told me not to watch the men’s doubles quarter final (featuring Team GB’s Chris Langridge and Marcus Ellis] but I sneaked in and it was really great to watch them get to the semi-final. They are spurring me on so by doing well; hopefully I can do the same for them.
“Hopefully I can raise the profile of singles badminton in Britain. Doubles has always been at the forefront of British badminton so if I can get anyone playing singles I would be more than happy with that.”