Defending champion Carlos Alcaraz beats Ugo Humbert 6-3 6-4 1-6 7-5
World number one Jannik Sinner beats Ben Shelton 6-2 6-4 7-6 (11-9)
Women's second seed Coco Gauff knocked out in 6-4 6-3 defeat by Emma Navarro
Jasmine Paolini progresses to quarter-finals after Madison Keys retires injured
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*Sun 6-2 5-7 5-2 Raducanu
Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds
This is the sort of comfortable lead that Lulu Sun would have wanted.
Very tricky times here for Emma Raducanu.
*Sun 6-2 5-7 5-2 Raducanu
Ashleigh Barty
Three-time Grand Slam champion on BBC TV
Raducanu's been under the pump early in service games and it forces you to work so much harder.
She just pressed a little too much,
*Sun 6-2 5-7 5-2 Raducanu
Lulu Sun, appearing at only her second Grand Slam, is serving for a place in the quarter-finals at Wimbledon.
If she were up against any other player but Emma Raducanu I think the crowd would be well behind her.
Away from the show courts, Britain's Neal Skupski and Kiwi partner Michael Venus are battling with Australian pair Rinky Hjikata and John Peers for a spot in round three.
After losing the first set 6-4 Hijikata and Peers, who beat Andy and Jamie Murray in the first round, struck back via a tie-break, but Skupski and Venus lead 4-3 in the third.
Elsewhere, four-time men's doubles Grand Slam champions Joe Salisbury and Rajeev Ram are just under way in their second round tie against Australian-German duo John Patrick Smith and Andreas Mies.
Briton Salisbury and American Ram lead 4-3 in the first set.
British partners Charles Broom and Arthur Fery trail Wesley Koolhof of the Netherlands and Croatian Nikola Metkic 3-3 in the opening set with the match on serve.
In the women's doubles, Britain's Olivia Nicholls and Serbian partner Tereza Mihalikova are heading for a deciding set after winning the opener 6-3 before losing the second 6-2 against Latvia's Jelena Ostapenko and Ukrainian Lyudmyla Kichenok.
And British duo Lily Miyazaki and Emily Appleton are 6-1 1-0 down in their encounter with Hsieh Su-Wei of Taiwan and Belgium's Elise Mertens.
*Sun 6-2 5-7 5-2 Raducanu
Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds
All out power from Lulu Sun, utterly lethal today with her forehand.
*Sun 6-2 5-7 5-2 Raducanu
Oh dear.
Emma Raducanu concedes the break with a double fault. What a shame.
Lulu Sun has just kept up that pressure and she will serve for the match.
Sun 6-2 5-7 4-2 Raducanu*
Lulu Sun has a second break point opportunity after executing a brilliant backhand return.
Sun 6-2 5-7 4-2 Raducanu*
Lulu Sun is dictating all the points here.
She sends Emma Raducanu off balance then places into the far corner out of her reach for deuce after Raducanu had worked herself a game point.
Sun 6-2 5-7 4-2 Raducanu*
Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds
I don't think Emma Raducanu can believe how well her opponent is playing.
Sun 6-2 5-7 4-2 Raducanu*
Oooh!
Lulu Sun sets up the forehand winner that she loves so much but she over-hits it long and that's break point saved. Deuce.
Sun 6-2 5-7 4-2 Raducanu*
Oh what a shot. A brilliant cross-court backhand from Lulu Sun brings up a break point and Emma Raducanu is on the ropes here.
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BetsySimba: Lulu doesn't look at all fazed
The odds must be against Radunanu when she is playing on Sun Day
Anon.
Sun 6-2 5-7 4-2 Raducanu*
Ashleigh Barty
Three-time Grand Slam champion on BBC TV
These are the matches that show the Sun’s toughness, coming through qualifying, playing under real pressure.
Sun 6-2 5-7 4-2 Raducanu*
Image source, Getty ImagesEmma Raducanu chuckles to herself as Lulu Sun gives her no room to return the forehand then nails the smash to draw level.
From 0-30, she brings up game point with a cross-court forehand winner and converts it when Raducanu's volley drops into the net.
Opportunity missed for Raducanu?
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You can see Raducanu is much the higher quality player. Hitting the ball much better than her opponent. Only a matter of time before she turns it around and pulls ahead
Fox - Lancashire
Whatever happens in the end of this game, two things are for sure - Emma is back in business and this Lulu Sun isn't going away anytime soon either. Plays nothing like her rank, I expect we will be seeing a lot of her in future! Great match.
Sean, Bath
*Sun 6-2 5-7 3-2 Raducanu
Lulu Sun begins her service game with a double fault then a very loose forehand which gives Emma Raducanu an opening at 0-30.
Can she capitalise?
Image source, Reuters*Sun 6-2 5-7 3-2 Raducanu
Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds
The composure from Lulu Sun has just been incredible today, throughout all the momentum shifts.
There's been a lot of time over the last half a hour when you could just start overthinking and it hasn't happened for her yet.
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Emma needs to stop being so passive on the second serve return and take that extra step in to court where possible when rallying. Taking the ball early will put Sun on the back foot.
Rich
*Sun 6-2 5-7 3-2 Raducanu
Aside from a really good forehand from Lulu Sun that is a straightforward hold for Emma Raducanu. As straightforward as it has got for her in this match.
Sun 6-2 5-7 3-1 Raducanu*
Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds
It feels like there are a lot more twists and turns to come in this match, I feel like it has got drama written all over it.
I just feel like Emma Raducanu is going to find her way navigating through to the end of this match.
Image source, EPA