Sheffield amateur Mitchell Travis produced the biggest shock of the UK Championship so far with a stunning 6-5 win over world number six Marco Fu in York.
The revamped tournament format sees even the top 16 in the rankings pitched into a 128-strong first-round draw at the Barbican Centre, with several of the top-ranked players matched against amateur opponents.
Fu led four times but Travis came back on each occasion to take the match to a final frame - and a fluked snooker in the decider proved crucial, as the 21-year-old then cleared the baulk colours to settle the match.
Travis told worldsnooker.com: "I haven't got words for that yet, it's the biggest win of my life.
"Before the match I knew I had nothing to lose. I came here as a rank outsider and thought as long as I don't make myself look like a muppet, I'll enjoy it.
"I was 2-0 down and went to the toilet and just had a word with myself to just play my natural game and not to put pressure on myself, and luckily I came through.
"The venue was absolutely marvellous and it was a dream come true to play here, I'll never forget it."
Fu aside, the rest of the big names in action made comfortable progress - none more so than Ricky Walden, who inflicted a 6-0 whitewash on China's Cao Xin Long.
Scottish pair John Higgins and Stephen Maguire enjoyed 6-2 wins over Alex Borg and Sanderson Lam respectively and last year's semi-finalist Mark Davis beat Finn Robin Hull by the same scoreline, with breaks of 80, 81 and 75.
Matthew Stevens was pushed hard by Hartlepool rookie Ryan Clark before eventually recording a 6-4 win, a result matched by rising star Luca Brecel against Mike Dunn.
Brecel will play Maguire in one of the more enticing second-round games. The Belgian teen's first televised appearance came against Maguire in last year's World Championship, when he impressed despite a 10-5 defeat.
Travis' reward for his outstanding result was a second-round clash with Norway's Kurt Maflin, who made breaks of 80, 83 and 72 in a 6-4 win over Liam Highfield.
Joe Perry beat James Cahill 6-3 and James Wattana, Robbie Williams, Rod Lawler, Tian Pengfei, Scott Donaldson and Daniel Wells were Friday's other winners.