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
Sonia Oxley
BBC Sport at Wimbledon
Mirra Andreeva has kept her word and is getting her revenge on coach Conchita Martinez!
She promised to coach her in the invitational doubles and wave a big poster - and that's exactly what she's doing!
"You'd better win this game!" she shouts. "You’re the best!"
Andreeva is scheduled to play her quarter-final on Wednesday against Belinda Bencic.
Sabalenka 3-6 6-2 2-3 Siegemund*
Another sign of the anger and frustration that Aryna Sabalenka is feeling - she smacks the top of her net with her racquet after going wide with a forehand as she scampered forwards.
Laura Siegemund keeps her honest after that, but misses chances to put away winners and Sabalenka wraps up the hold to get back to 3-2 behind.
Fritz 6-3 6-4 1-6 7-6 (7-4) Khachanov
Image source, Getty ImagesTaylor Fritz speaking to BBC Sport: "I'm feeling great. The match was going so well for me for two sets. I've never had a match flip so quickly, so I'm happy with how I came back. Momentum was not going to be on my side going into a fifth set.
"He definitely started playing a bit better. I gave him a lot of hope with not the best game to start the third set. I've never had a match change so drastically where I felt so in control, serving great, putting pressure on his serve, and then I started making a ton of mistakes. I felt I couldn't miss and then I started making a ton of mistakes. I had to fight to get that break back in the fourth and get the match back to neutral."
On his foot: "It's totally fine. It's pretty common. A lot of players do this tape job so your foot doesn't get irritated. I just needed to get it re-done [at the end of the third set]."
On reaching his first Wimbledon semi-final: "It's an amazing feeling. Having played the quarter-finals here twice and lost in five twice, I don't think I could've taken another one. I'm really happy."
On his career progression: "At the time [2021], I feel like my ranking was slipping. I was coming back from surgery and I wasn't playing the level I felt like I should be playing. I'm happy with how I've turned my career around over the last four years or so."
*Sabalenka 3-6 6-2 1-3 Siegemund
Two excellent serves from Laura Siegemund help her back up that break of serve in the previous game.
Sabalenka 3-6 6-2 1-2 Siegemund*
Sam Smith
Former British number one on BBC One
It was coming.
The umpire has been very generous out here. He is hugely experienced and he had been letting it go.
It is not the first time Siegemund has had a time violation at this year's championships.
Sabalenka 3-6 6-2 1-2 Siegemund*
Tracy Austin
Two-time Grand Slam champion on BBC One
Sabalenka is hitting her leg, shouting to herself.
This is going to take a lot of mental strength for Sabalenka to get through this difficult situation.
Sabalenka would love to win Wimbledon - a major that is off the hard courts.
Sabalenka 4-6 6-2 1-2 Siegemund*
Annabel Croft
Former British number one on BBC Radio 5 Live
It is quite incredible to witness what is going on here.
I thought Sabalenka had settled and was starting to get shape on her shots and rally more, but Siegemund has gone back to this cat and mouse tennis. Horrible little drop shots that are so awkward to play.
Sabalenka 3-6 6-2 1-2 Siegemund*
Two massive groundstrokes, the second a backhand down the line for a winner, bring up 0-30 for Aryna Sabalenka as he bids to strike straight back after losing serve.
Two Sabalenka errors level up the score at 30-30, before the Belarusian is brought to her knees when she misses a passing shot down the line. She had more space than she probably thought and maybe tried to be a bit too cute with it, sending it a foot inside the tramlines.
Siegemund nets from the next point - deuce.
And now a time violation for Siegemund, who has been extremely deliberate while serving throughout this match. It's been coming...
Sabalenka 3-6 6-2 1-2 Siegemund*
Tracy Austin
Two-time Grand Slam champion on BBC One
That was an incredible point.
It shows all the ability Siegemund has for these awkward shots. That, I believe, is from the doubles she plays.
Sabalenka 3-6 6-2 1-2 Siegemund*
Image source, PA MediaThe world number 104 breaks first in the deciding set!
Laura Siegemund takes control on the first break point with a brilliant return but Aryna Sabalenka just keeps getting the ball back, until Sabalenka is too far out of position and Siegemund sends it cross court for a winner at the net.
*Sabalenka 3-6 6-2 1-1 Siegemund
0-30 for Laura Siegemund as Aryna Sabalenka goes wide with a backhand volley and then a forehand.
And then a tremendous drop shot brings up three break points...
Fritz 6-3 6-4 1-6 7-6 (7-4) Khachanov
Image source, ReutersTaylor Fritz nails the smash and drops his racquet in celebration. He only needed one match point.
Fritz is through to his first Wimbledon semi-final.
*Sabalenka 3-6 6-2 1-1 Siegemund
Aryna Sabalenka turns up the power to pull things back from 40-0 down to 40-30, before an outrageous net cord in Laura Siegemund's favour earns the German the game.
Fritz 6-3 6-4 1-6 6-6 (6-4) Khachanov*
Match point for Taylor Fritz.
Fritz 6-3 6-4 1-6 6-6 (5-4) Khachanov*
Karen Khachanov wins a net battle to bring the tie-break back on serve.
*Fritz 6-3 6-4 1-6 6-6 (4-3) Khachanov
Karen Khachanov pulls out an ace of his own to pull it back to 4-3, but it remains advantage Fritz.
Fritz 6-3 6-4 1-6 6-6 (4-1) Khachanov*
Bang. Bang. Two more aces. Taylor Fritz has raced into a 4-1 lead.
Sabalenka 3-6 6-2 1-0 Siegemund*
Tracy Austin
Two-time Grand Slam champion on BBC TV
The intensity they both have to play at - point in and point out - it is exhausting.
*Fritz 6-3 6-4 1-6 6-6 (2-1) Khachanov
What a time for an ace for Taylor Fritz! He takes a 2-0 lead in this fourth set tie-break but Karen Khachanov pulls one back with a thumping forehand volley.
*Fritz 6-3 6-4 1-6 6-6 Khachanov
Image source, Getty ImagesTaylor Fritz holds his hand up in apology as some handy assistance from the net cord levels the game at 15-15.
A booming baseline battle goes the way of Karen Khachanov as Taylor Fritz misfires a backhand wide of the tramline.
The American puts the pressure back on his opponent with a mighty smash but Karen Khachanov stands firm to hold to 30.
We're going to a tie-break. I don't think Khachanov has lost one at Wimbledon this year.
