Rank outsider Rory McLeod produced a sensational upset by knocking second seed Judd Trump out of the 2017 World Snooker Championship in Round One at The Crucible on Wednesday.
McLeod, ranked 52 places below Trump in the Order of Merit, overturned an early 4-0 deficit to claim a memorable 10-8 triumph with a dogged display in Sheffield.
The former Ruhr Open winner held his nerve to seal the deal in an unscheduled third session after time constraints had meant the pair were pulled off the table in the afternoon and forced to return to a finish later in the evening.
McLeod will now meet Stephen Maguire in Round Two and admitted: "It's the biggest win of my career.
"I was relaxed at 4-0 down - he was potting everything and there's not much you can do so you have to bide your time.
"Maybe I went into zombie mode because I didn't know the score - if it was 4-4 or 5-4?
"I tried not to think about things too much. You have to dismiss the pressure."
An out of sorts Trump managed a high break of just 65 amid an apparent shoulder injury which hampered him for much of the second session.
McLeod, renowned for his methodical style of play, dug deep and frustrated the young Bristolian, going on to remain either in front or level from frame nine onwards.
Trump became the fourth seeded player to bow out of the competition at the first hurdle and was joined on Day Five by Ryan Day (16) and Ali Carter (10).
Day was comprehensively beaten 10-4 by Chinese qualifier Xiao Guodong - who defied high breaks of 125, 72 and 98 from the Welshman to claim his first ever win at The Crucible.
Carter, meanwhile, went down 10-7 to 2006 World Champion Graeme Dott in a high quality affair in which 'The Captain' produced two century breaks in defeat.
Dott pressed home an early 4-0 advantage to close out an impressive victory and advance to a Last 16 meeting with either Barry Hawkins or Tom Ford.
Hawkins has the upper-hand in that tie after opening up a commanding 7-2 overnight lead, having reeled off six consecutive frames from 2-1 behind.
Ford began brightly with breaks of 50 and 91, but it was one-way traffic from frame four onwards as 'The Hawk' compiled breaks of 65, 52, 132 and 55 in storming clear.
Neil Robertson also has one foot in the Second Round after establishing an 8-1 lead over debutant Thai qualifier Noppon Saengkham.
The 2010 World Champion fired in high breaks of 76, 77, 61 and 113 and is now just two frames away from a Second Round clash with eighth seed Marco Fu.
Betfred World Championship 2017 Results
Wednesday April 19
Judd Trump 8-10 Rory McLeod
Neil Robertson (8-1) Noppon Saengkham
Allister Carter 7-10 Graeme Dott
Ryan Day 4-10 Xiao Guodong
Barry Hawkins (7-2) Tom Ford