Judd Trump became the first major casualty at this year's Cazoo World Snooker Championship as he lost 10-6 in the first round to Scotland's Anthony McGill.
The 2019 champion began Wednesday's second session 6-3 behind but won the first two frames to reduce the deficit to one. He looked like leveling at 6-6 but McGill produced a clearance from 40 points behind to go 7-5 ahead.
Trump again reduced the gap to one before the mid-session interval but McGill, a beaten semi-finalist in 2020, came out after the break all guns blazing and reeled off the three frames he needed to complete victory.
McGill will face Jack Lisowski in round two after the Londoner fended off a late fightback from Noppon Saengkham to win 10-7.
Saengkham resumed 6-3 down, but opened up the morning session with fine long red.
However, both players then missed the chance to wrap up what was a scrappy frame - which included three flukes - before Lisowski finally finished off on the colours.
The Thai qualifier then edged the next 68-61 on a respotted black.
Saengkham promptly lifted his cue in the air with both hands to mimick the celebration of Dennis Taylor from his memorable 1985 victory over Steve Davis in a nail-biting last-ball decider.
Lisowski, though, responded with a break of 65 to take the 12th frame and the next to move to the cusp of victory as he headed into the mid-session interval with a lead of 9-4.
Following the restart, a break of 62 saw Saengkham reduce the deficit before also taking the 15th frame and then making a fine 130 clearance to close within two.
World number 12 Lisowski, a quarter-finalist last year, failed to build a match-winning break when set in the 17th frame, but Saengkham could not capitalise.
Some solid safety from Lisowski helped him edge back in front before cutting in a long blue left Saengkham needing snookers and 'Jackpot' Lisowski then finally booked his place in the last 16 by potting the pink.
