Ronnie O'Sullivan edged a scrappy encounter against Joe O’Connor in the first round of the World Grand Prix.
O’Sullivan hit three half-century breaks on his way to a 5-3 win in Hong Kong.
It was a day of upsets elsewhere with Northern Ireland's Mark Allen losing a deciding frame to Ali Carter.
The Antrim man led 3-1 at the interval but Carter came strorming back.
A break of 86 clinched the match for Carter on a 5-4 scoreline.
World number one Judd Trump was dumped out by Yuan Sijun.
The Chinese put in a dominant performance, setting the tone for a 5-2 triumph with a 103 break in the opening frame.
Former world champions Shaun Murphy, John Higgins and Neil Robertson all also exited.
Murphy was soundly beaten 5-1 by Pang Junxu, Higgins went down 5-3 to Zhao Xintong and Jak Jones ousted Robertson 5-1.
