Image source, Getty ImagesHossein Vafaei will face Ding Jinhui or Shaun Murphy in the quarter-finals
Ronnie O'Sullivan is out of the World Open after a surprise defeat by Hossein Vafaei in the last 16 in China.
The world number one took the match to a deciding frame with a brilliant break of 125 in the eighth, which levelled it at 4-4 in Yushan.
But O'Sullivan missed a crucial black in a thrilling final frame, which allowed Vafaei back to the table to complete a 5-4 victory.
The Iranian will play Ding Jinhui or Shaun Murphy in the last eight.
Elsewhere, 2019 World Open champion Judd Trump will take on Kyren Wilson in the quarter-finals after his 5-3 win against David Lilley.
Trump, the world number two, is aiming for his fifth title of the season before next month's World Championships in Sheffield.
Stephen Maguire was unable to repeat his performance against reigning world champion Luca Brecel in the previous round as he lost 5-1 to Barry Hawkins.
Neil Robertson or Chris Wakelin await Hawkins in the quarter-finals.