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RESULT: Ronnie O'Sullivan 13-9 Si Jiahui
RESULT: Judd Trump 13-8 Luca Brecel
Earlier results:
John Higgins 12-13 Mark Williams
Chris Wakelin 5-13 Zhao Xintong
Quarter-finals are best of 25 frames
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O’Sullivan 10-7 Si
The cue power of Si Jiahui is a sight to behold. He rattles in another cracking pot and while his white ball control is a touch off, he's making up for it with his potting.
The pack is nicely stationed. And a chance here to make it 10-8...
Trump 10-8 Brecel
A record 104th century break in a season for Judd Trump.
He knocks in 116 to follow his 115 in the previous frame.
Two from two and he's 10-8 up in the race to 13.
That Judd Trump century means he equals the record of 103 for a single campaign set by Neil Robertson in 2013-14.
A special feat by another left-handed player.
Image source, BBC SportO’Sullivan 10-7 Si
Corrrr, right on cue, so to speak, Si cuts in an absolutely wonderful long red, just slightly loose at the base of the pack. That was something else.
Ken Doherty
1997 world champion on BBC iPlayer
Si has got to be able to create chances for himself, his long potting is sensational. It's a great gift, to give yourself those chances.
O’Sullivan 10-7 Si
There can be no other sport where the two competitors have to sit so close to one another during the break. Always makes me chuckle as Si now breaks off for frame 18 of this quarter-final.
Ronnie O'Sullivan is seeking history at the Crucible, chasing a modern-era record eighth World Championship
The Englishman is currently tied on seven with Scot Stephen Hendry.
O’Sullivan 10-7 Si
A missed red to the middle ends that bit of fun though - and it's first blood tonight to the underdog.
O’Sullivan 10-6 Si
End of break! But not the frame. O'Sullivan comes to the table needing snookers, he is going to clear up just to get some time on the table.
O’Sullivan 10-6 Si
John Virgo
1979 UK Championship winner on BBC Two
Three reds and colours would be enough you'd think.
O’Sullivan 10-6 Si
It's turned into a safety duel. Ronnie sits the white on a red near the pink spot and this could be pottable - it is!
Good shot Si Jiahui! Can he go on and win the frame?
#bbcsnooker, via WhatsApp on 03301231826 or text 81111 (UK only, standard message rates apply)
This Brecel vs Trump match is something else. Both are playing with so much heart and skill. You can feel the respect between them, and it’s just great snooker all around. Honestly, don’t even mind who wins - just loving the ride!
Farrah, London
O’Sullivan 10-6 Si
It's not often you see Ronnie O'Sullivan turn down a pot but he already has twice in this opening frame tonight. A tentative rocket perhaps.
Trump 9-8 Brecel
Dennis Taylor
1985 world champion on BBC iPlayer
Judd Trump weathered the storm this afternoon. The world number one never panicked and now he's ahead.
Trump 9-8 Brecel
Just the start Judd Trump needed.
A break of 115 and he's ahead again.
Have a feeling this is going all the way tonight.
Image source, PA MediaO’Sullivan 10-6 Si
Ahhh, that tricky cue ball position causes Si to miss a red and brings his break to an end. He leads 38-1 in the frame though and the balls aren't lying too kindly.
O’Sullivan 10-6 Si
Ken Doherty
1997 world champion on BBC iPlayer
The black is still not pottable so Si is having to work with the pink and possibly the blue. But he's taken these well so far.
O’Sullivan 10-6 Si
The reds are scattered about the table so Si is going to have to work for this - but he's in amongst them and building a break.
O’Sullivan 10-6 Si
Si leaves Ronnie a very long red after kissing the yellow but the rocket turns down the pot. Another slightly loose safety from the Chinese tempts Ronnie into a pot but he overcuts it.
Both players looking a bit edgy. Understandably.
Shot! Si Jiahui then smacks home the long red and kisses the black into action as well. Chance here.
I should have said - you can of course WATCH live coverage in this page again now, just press play at the top.
