The referee, Rob Spencer, tells both players a re-rack is going to happen if they keep just nudging the cue ball, but Si, holding a 46-point lead, clearly would have the most to lose so has to end the nudge-nudge game and plays properly safe.

Si pots a pink and tries to split three reds, but the look away in disgust shows he has not been successful. He then misses a nudge to the red to give Wilson four points, although Si still leads 55-9.

Si pots a fine long red to move 27-5 ahead and the resulting brown into the middle gives him a chance to close the overall deficit.

We're back under way and Si has a 21-5 lead after the cue ball had ended up right in the middle of the pack of reds.

Steve Sutcliffe
BBC Sport

Image source, Getty Images

Kyren Wilson and his wife Sophie are working with snooker's world governing body to set up a support network for the families of players on tour.

The World Professional Billiards and Snooker Association (WPBSA) and the Wilsons, who have two young sons, are hoping to put something in place by the time the World Championship gets under way in April.

Wilson, 34, who won the world title in 2024, has previously spoken about struggling "emotionally and mentally" being away from home as Sophie and other family members had to contend with serious health issues.

In December, the Englishman, said he was close to having a "mental breakdown" during his last-32 defeat by Elliot Slessor at the UK Championship

In an interview with BBC Sport, he expressed hope that snooker could deliver a tailored programme for players' partners and families to help them navigate difficult periods while players are travelling the globe competing.

"I don't think there's anything like that in any other sport," Wilson said.

"If snooker can be the first sort of stepping stone for that to happen I think it would be phenomenal and you know the obviously the main goal is if we can help anybody in need.

"We're literally in a different city, different country every other week. I think where we're going with this is if the families back home are struggling with the sort of ebbs and flows of tour life, there will be a support network and system where they can log in and chat with those going through exactly the same thing and just know that they're not on their own."

• Read more here

A very good opening four frames of snooker, and Kyren Wilson has taken three of them - and had an attempt at a maximum and got to 80 but no further.

This could easily become the best match of the tournament so far and you certainly still wouldn't rule Si out of it.

Mid-session interval time and Wilson goes in the happier of the two.

Si gets 25 points back and convinces himself that a shot at the black, when close to a red, goes. But it doesn't and he hits the red first to gift Wilson seven points.

But Kyren then misses frame ball to keep the fourth frame alive.

Kyren Wilson makes a break of 48 to go 53-0 ahead, only to then miss a red and go in-off to hand Si a chance, albeit a very difficult one.

Steve Davis
Six-time world champion on BBC Two

Kyren's body language is a bit of a transformation from what we saw at the UK Championship. He was in bits there. This is a great recovery.

This was almost a wonderful story as Kyren Wilson made an attempt at a maximum 147. He got 10 reds and 10 blacks along.

Have a watch of the whole attempt here...

This is a very high-quality encounter at the moment, with Si Jiahui making a wonderful break of 97, the highest of the match so far to get his first frame.

He had a chance of a century but he misses a cut on the black.

Si, a former World Championship semi-finalist, had made an awful start to the frame, conceding two fouls and being warned another one would have cost him the frame.

Steve Davis
Six-time world champion on BBC Two

This has been a tightrope break. Si is letting Kyren know he is in a match. This type of snooker scares the life out of your opponent. Nothing is safe.

A hand of apology from Si as he gets a fortunate ricochet to knock a red in, but no apology needed after a beautiful long blue gives himself a good chance of getting a frame on the board.

Si Jiahui, with a clear shot at the reds, tries twice to get a thin clip and misses twice. He then gets warned that a third foul and miss would result in the frame being automatically awarded to Kyren Wilson.

This time, he does hit the red and leaves it safe too. That exchange still cost him eight points though.