Last year he was beaten in the final but this time Stuart Bingham suffered a first-round exit at the hands of Ryan Day.
Bingham went 1-0 down in the opening frame of his first-round tie against Day.
The 2015 world champion later made an 86 break to pull the match level at 2-2 but Day won back-to-back frames to avenge his quarter-final defeat against Bingham in the same competition last year.
Day knew the size of the challenge facing him but was relieved that Bingham was not firing at his absolute best.
“Stuart’s number two in the world and luckily today for me he was slightly off because I missed one or two myself,” he said.
“Stuart’s a good player so it’s always a tough game.”
Mark King is into the last-16 after recording just his second win over Stephen Maguire since the turn of the century.
The 42-year-old last beat King in the 2013 German Masters.
Shaun Murphy moved one step closer to defending his World Grand Prix crown with a comfortable 4-1 victory over Michael Holt.
There was a slender chance of an upset from Holt when he levelled at 1-1 but Murphy took the next three frames, making two 73 breaks to extend Holt’s wait for his first major title.
Joe Perry rounded off the afternoon, coming from behind to beat Mark Williams 4-2.