Defending champion Neil Robertson has been knocked out within the first spherical of the World Grand Prix in Hong Kong following a 5-1 defeat by Jak Jones.

World quantity three Robertson entered the event in good type after reaching the semi-finals of the German Masters final week, however failed to hold his momentum into the tie with Jones.

Robertson began nicely with a break of 46, however a missed crimson handed the initiative to Jones, who went on to open up a 2-0 lead.

A break of 88 noticed Robertson briefly combat again to win the third body, however Jones took management afterwards, triumphing within the subsequent three to ease into the second spherical.

The match in Hong Kong passed off solely three-and-a-half days after Robertson’s 6-1 defeat by Shaun Murphy in Berlin, with the Australian chopping a pissed off determine all through.

Former World Championship finalist Jones will play Zhou Yuelong within the second spherical on Thursday.

Seven-time world champion Ronnie O’Sullivan joined Jones within the second spherical after recovering from a gradual begin to beat Joe O’Connor 5-3.

After combating again from 2-0 down, O’Sullivan levelled the match earlier than shedding the fifth body to slide behind once more.

However two breaks of 72 noticed O’Sullivan take a 4-3 lead, earlier than wrapping up the match with a wonderful minimize of the pink.

O’Sullivan will play Xiao Guodong within the second spherical on Thursday as he continues his bid for a record-extending forty second title.