The very first match of snooker's World Grand Prix produced what may well be the biggest upset of the event, as Robert Milkins beat Neil Robertson 4-2.
Having skipped the Scottish Open, Robertson was expected to be fresh and ready for his title defence here but was instead caught cold by Milkins, who took the opening frame from 67-0 down before a break of 116 saw him go 2-0 up.
Robertson rallied to level at 2-2 but after a wild missed blue in frame five, Milkins again impressed among the balls with an 84 break which had him within one. Victory was sealed in the next as Robertson again came unstuck among the balls and 44-year-old Milkins held his nerve.
"I played really well," said Milkins. "I didn't really miss anything easy in the balls. Maybe one or two things went against Neil - he missed that red in the first frame which was a big settler for me, clearing up; I was so nervous.
"He's beat me plenty of times, he's took enough money off me in the past! He's a class player, you've always got to play well to beat Neil. That's the best I've played (against Robertson)."
In the same quarter of the draw, John Higgins didn't need to be at his best to overcome Xiao Guodong.
Both players struggled for control of the cue ball in the early exchanges, but after Higgins edged into a 2-1 lead, he began to warm to his task and eventually prevailed 4-2 thanks to breaks of 59, 69 and 114.
For Xiao's part, he stroked in a fabulous break of 128 in frame five but it wasn't enough to save him from defeat.
On the second table, Barry Hawkins fended off Ricky Walden, who had looked poised to rally before losing the fourth frame by a point on his way to a 4-1 defeat.
Hawkins had been in command from the off but saved his best until the final frame, a 112 break securing his place in the second round where he'll face either Ronnie O'Sullivan or Ali Carter.
Anthony McGill looked in good order as he beat Joe Perry 4-2, a century break in the second frame the highlight. He could face Mark Selby next.