Watch and follow BBC TV and radio coverage of day nine of Wimbledon (UK only)
GB's Cameron Norrie comprehensively beaten 2-6 3-6 3-6 by defending champion Carlos Alcaraz
World number one Aryna Sabalenka wins 4-6 6-2 6-4 against Laura Siegemund in quarter-finals
Amanda Anisimova wins 6-1 7-6 (11-9) against Anastasia Pavlyuchenkova
Taylor Fritz first player through to singles semi-finals, winning 6-3 6-4 1-6 7-6 (7-4) against Karen Khachanov
Britain's Alfie Hewett starts wheelchair title defence with 6-1 6-2 win over Daniel Caverzaschi, Gordon Reid also through
Fritz 6-3 6-4 Khachanov*
Gary Rose
BBC Sport at Wimbledon
More frustration for Karen Khachanov as he slaps his bag with his racquet as Taylor Fritz breezes to the second set.
Fritz took 12 points in a row on his way to going 2-0 up and Khachanov has a mountain to climb.
Sabalenka 2-5 Siegemund*
Is the pressure just getting to Laura Siegemund with the first set within her grasp?
A double fault hands Aryna Sabalenka three break points.
Fritz 6-3 6-4 0-0 Khachanov*
Image source, Getty ImagesKaren Khachanov had only won seven points on Taylor Fritz's serve before this game, so getting four more (at least) here to break looks a tall order.
And so it proves. The tally is still seven.
A backhand winner down the line from Fritz on set point and the American is one set away from a place in the semi-finals.
*Reid 5-7 6-4 0-0 Gerard
Image source, Getty ImagesThat's more like it, Gordon Reid.
The Brit is back on level-terms in this first-round men's wheelchair singles match with 2021 champion Joachim Gerard.
Reid had to do it the hard way in the end having been broken when serving for the set, but he immediately broke again in the next game to take it 6-4.
Can the 2016 winner now complete the comeback and progress to the quarter-finals?
Sabalenka 2-5 Siegemund*
Annabel Croft
Former British number one on BBC Radio 5 Live
This tennis is absolutely mesmerising to watch, I don't think Siegemund could be playing better than she is. It makes me wonder how she hasn't got past the second round in any previous attempt at Wimbledon? She is a nightmare for anyone.
She is creating enormous amounts of doubt for Sabalenka. She is unravelling down the other end.
Sabalenka 2-5 Siegemund*
Tracy Austin
Two-time Grand Slam champion on BBC One
Siegemund's anticipation is a masterclass. This is incredible and her return quality is 9.3 today. She is having no trouble with Sabalenka's power.
She doesn't have a big serve but she has slice on it so it stays down low.
Sabalenka has really worked on her backhand slice, it's a shot she didn't hit that well a few years ago. I would like to see her take more of those high balls out of the air.
*Fritz 6-3 5-4 Khachanov
Gary Rose
BBC Sport at Wimbledon
Karen Khachanov is regularly doing his best to motivate himself, saying a few words and pointing to his eyes to say focus, but then slams his towel down at the back of the court in frustration after giving up the first two points on his serve.
It doesn't get any better as Taylor Fritz gets the break and now has the second set firmly in his sights.
*Fritz 6-3 5-4 Khachanov
Image source, ReutersTaylor Fritz sends a backhand winner down the line and then gets a bit of luck with a net cord for 0-30.
He gets a look at a second serve and it's a good one from Karen Khachanov into the body - somehow Fritz gets it back into play and Khachanov eventually goes wide.
Three break points - Fritz only needs one.
The fifth seed will be serving for a two-set lead after the changeover.
Sabalenka 2-5 Siegemund*
Image source, Getty ImagesJust brilliant from Laura Siegemund - the German breaks again and will serve for the first set.
Fritz 6-3 4-4 Khachanov*
A hold to love.
*Sabalenka 2-4 Siegemund
Image source, PA MediaImportant hold for Laura Siegemund - and, of course, she clinches it with a drop shot.
Aryna Sabalenka has been trying to get on top and dominate the rallies but Siegemund is mixing it up well to put the world number one off her stride.
It still gets to deuce, and there is no doubt Sabalenka has started to adapt to her opponent's style, but Siegemund keeps herself a break up.
*Fritz 6-3 3-4 Khachanov
Taylor Fritz has had four break-point chances in this second set and taken none of them. That'll annoy him.
"New balls, please," says the chair umpire.
Fritz 6-3 3-3 Khachanov*
Taylor Fritz sends a forehand about six feet beyond the baseline and we're at deuce.
Fritz 6-3 3-3 Khachanov*
Critical moment in this match.
Fritz 6-3 3-3 Khachanov*
Image source, Getty ImagesTaylor Fritz starts his latest service game with a lovely finessed forehand winner down the line. The tennis equivalent of the sidefoot with curl around the keeper into the far corner.
And the American now has 0-30 on the Karen Khachanov serve...
Sabalenka 2-3 Siegemund*
Tracy Austin
Two-time Grand Slam champion on BBC One
Siegemund has just enough top-spin for control. She has lost a little bit of control with her slice so far. It is really tricky to receive a slice on grass, Sabalenka needs to a get bit lower. You have to be really alert when receiving that shot.
Sabalenka has definitely improved at the net recently.
Image source, BBC SportCarlos Alcaraz has been practising with fellow quarter-finalist Ben Shelton on court 16. Alcaraz chatted to Spiderman actor Tom Holland after. The two men shook hands, and Holland wished Alcaraz good luck.
Cameron Norrie said he was feeling “all good” as he signed autographs and left a practice session.
Image source, BBC Sport*Fritz 6-3 2-3 Khachanov
Gary Rose
BBC Sport at Wimbledon
Karen Khachanov shook his fist in the air as he took his seat at the changeover as this second set continues to go with serve.
The Russian is serving better but still difficult to see how he breaks Taylor Fritz's serve, but me writing that is usually a pathway to his opponent being broken in the next game...
Sabalenka 2-3 Siegemund*
Amy Lofthouse
BBC Sport at Wimbledon
Aryna Sabalenka made a real effort to get to the net more in that last service game, presumably to try and give Laura Siegemund a taste of her own medicine.
Siegemund has got her towel over her head at the changeover - it is a warm one today.
Sabalenka 2-3 Siegemund*
Aryna Sabalenka holds for the first time.
It's far from comfortable for the Belarusian, though, as she has to get through multiple deuces.
Laura Siegemund hangs in, continuing to play those tricky slices and drop shots but eventually Sabalenka gets it done with a smart volley at the net.
