Allen vs Jones level, O'Sullivan moves clear of Brecel

Mark Allen and Jak Jones are level at 4-4 following the first session of the World Snooker Championship quarter-final at the Crucible.

Jones, on the back of the biggest win of his career over Neil Robertson, race into a 2-0 lead thanks to breaks of 78 and 94.

Allen hit back with a sensational 137 and it looked like a high-quality match would ensue.

But there would be just one further half-centry in the remainder of the morning's play which the Belfast man shaded.

Jones missed a simple brown to take a 5-3 lead in the final frame as Allen levelled proceedings before tonight's second session

Ronnie O'Sullivan cut a frustrated figure despite fashioning a 6-2 advantage at the end of the first session against Luca Brecel.

The seven-time champion took some time to settle and muttered "it's a hard game today" after running out of position midway through a scrappy fourth frame.

O'Sullivan also thumped his leg in anger after missing a black in the seventh frame, but still managed to overhaul a 2-1 deficit and move within seven frames of sealing his place in the semi-finals upon their resumption on Tuesday evening.

A quickfire session looked in store when Brecel opened proceedings with a break of 93 and O'Sullivan responded with a fast 56 which proved enough despite a rare missed black off its spot.

Another error from O'Sullivan served up Brecel for a frame-winning break of 68 to move in front, and only a tenacious 35 clearance in the next allowed O'Sullivan to edge in at the mid-session interval all square.

It was Brecel's turn to feel frustrated after the restart as a series of costly errors from the Belgian put the momentum firmly in O'Sullivan's hands.

A break of 59 sent O'Sullivan in front for the first time before Brecel was punished