Ken Doherty knocked John Higgins out of the BetVictor Welsh Open with a shock 4-1 win.
World number five Higgins had been in fine form on Monday at the Newport Centre, beating Gareth Allen 4-1 with breaks of 120, 99 and 97, but could not replicate that display against his fellow former world champion.
Doherty took the first two frames but Higgins won a tense third, clearing from the green to settle a low-scoring and closely-fought frame.
Doherty needed several attempts to wrap up the next frame, but finally did so by potting the final brown to move within one frame of victory.
A break of 46 put him in control in the next and Higgins' response stalled at 14 before the Irishman sealed victory.
"I have played Anthony a few times this season and he has beaten me," said the Scot.
"He's a great player and he was scoring heavily at the start. It was a good match for the first four frames and then we both struggled."