Serena Williams' Wimbledon singles return ends with 6-3 6-7 (6-8) 6-3 defeat by 20-year-old Australian Maya Joint under Centre Court roof
Stan Wawrinka loses epic match 7-6 (9-7) 6-7 (16-18) 6-7 (7-9) 6-7 (5-7) to Matteo Berrettini in final Wimbledon appearance of his career
GB's Jan Choinski, Katie Swan, Arthur Fery and Jacob Fearnley all through to second round
Toby Samuel loses final-set tie-break as 15th seed Jakub Mensik advances, while Katie Boulter goes out in straight sets
Defending women's champion Iga Swiatek and Elena Rybakina both win three-set matches
French Open champion Alexander Zverev battles through in four sets but fourth seed Ben Shelton suffers shock defeat
Mensik 5-7 6-3 6-3 0-0 Samuel*
Jakub Mensik finishes the third set with a fantastic drop shot to edge ahead of Toby Samuel.
The Brit looked almost distraught after hitting a forehand wide when he was ahead 15-30 - as if he knew that point had cost him the set.
Mensik took advantage of the error, won his next three points and is now just one set away from round two.
Image source, Getty ImagesBlockx 4-5 Zverev*
That break of serve to love has come from absolutely nowhere.
A double fault at 0-30 down leaves Alexander Blockx with too much to do and he nets a forehand to give away the break.
Image source, Getty Images*Blockx 4-4 Zverev
Alexander Zverev has got 18 of his first 21 first serves in play (86%) and won all three points when he's had to send down a second serve.
And he's got 0-40 on the Alexander Blockx serve...
Rybakina 6-4 1-6 1-0 Boisson*
Elena Rybakina rattles through the opening game of the third set with a couple of venomous first serves.
That's her first hold to love in the match.
Image source, Getty Images*Mensik 5-7 6-3 5-3 Samuel
Jakub Mensik gets a crucial break - the first one of the set - against Toby Samuel to put himself in the driving seat against the Brit.
Mensik's reaction to Samuel's long ball tells you all you need to know - this has been a real battle for the 20 year-old.
If his serving so far is anything to go by, it is almost certain that he will hold and take set three.
Blockx 4-3 Zverev*
Both players are looking extremely strong on serve in the early stages of this first-round match.
No break points for either player in the first seven games.
*Rybakina 6-4 1-6 0-0 Boisson
Well, a major reset is needed by former champion Elena Rybakina on court one. She's been taken to a decider by Wimbledon debutant Lois Boisson, surrendering the second set 6-1.
Boisson is really targeting the second seed's forehand on serve but she's also being helped by an error-strewn performance at the opposite end of the court.
Rybakina hit 13 unforced errors to Boisson's four in the second set. While she hit 12 in the first, they were balanced out by 15 winners compared to just four in the second.
*Blockx 3-3 Zverev
Tim Henman
Former British number one on BBC One
The hunger for Grand Slams is absolutely still there for Alexander Zverev, but winning his first one will have given him a certain level of freedom.
He has been hoping and expecting to win a Grand Slam. He had been so close in three finals but couldn't quite get over the line. When Jannik Sinner and Novak Djokovic lost in Paris, it was all about who could take advantage and he did so well mentally.
He would be in my top three fittest players in the men's game, in terms of endurance.
*Khachanov 6-3 5-7 1-0 Harris
Karen Khachanov bounces right back from the gruelling battle of set two by breaking Billy Harris in set three.
At deuce, Khachanov hit what has to be one of the finest returns of the tournament so far, lasering back Harris' serve from outside the court to find the line on his forehand.
From there, the first game in the third set was only going one way.
Image source, Getty Images*Blockx 3-3 Zverev
A strange misjudgement by Alexander Zverev on the first point of his latest service game, advancing too far to a half-court return by Alexander Blockx and tamely hitting the net with a forehand.
The German recovers from 0-30 down to force deuce and eventually hold serve.
Image source, PA MediaRybakina 6-4 1-5 Boisson*
Elena Rybakina plants a simple forehand in the net. 40-15.
Two set points for Lois Boisson against the second seed.
Rybakina 6-4 1-5 Boisson*
Lois Boisson returns to the court and immediately breaks to 30. Errors are flying from Elena Rybakina's racquet.
Boisson, up a double break, will serve for the second set.
Blockx 3-2 Zverev*
Tim Henman
Former British number one on BBC One
As we look from our commentary box, it seems as though there is a bit of a breeze from the umpire's left or the end that Alexander Blockx is serving from.
He has the wind behind him so that isn't normally the end you're going to play a drop shot from because you want to use the wind to hold the ball up.
*Rybakina 6-4 1-4 Boisson
Lois Boisson, leading 4-1 in the second set, receives some treatment on her left calf at the change of ends and subsequently leaves the court for a medical timeout.
The Frenchwoman didn't play between September's China Open and April's Madrid Open due to a series of injuries.
*Blockx 2-2 Zverev
Alexander Zverev rattles through a service game in a little over a minute to level the score again in the first set.
Blockx 2-1 Zverev*
A drop-shot winner from Alexander Zverev gets him to 0-30 on the Alexander Blockx serve, but the Belgian responds well and takes the next four points - including an ace out wide which clips the line - to hold serve.
Image source, Getty Images*Kokkinakis 6-4 3-6 7-6 (12-10) 0-1 Bublik
Thanasi Kokkinakis is back in front against 10th seed Alexander Bublik, leading by two sets to one.
The third set went with serve throughout, although Bublik wasted set point in the 10th game, before Kokkinakis won the tie-break 12-10.
The Australian needed four set points to get over the line; Bublik spurned another two.
Image source, Getty ImagesKhachanov 6-3 5-7 0-0 Harris*
Britain's Billy Harris fights back in what was an extremely even second set against 19th seed Karen Khachanov on court 18.
Harris breaking the 30-year-old in the 12th and final game proved to be decisive and the world number 155 will serve to get the third set underway.
Image source, PA Media*Blockx 1-1 Zverev
A couple of routine holds of serve by the two Alexanders to start on Centre Court.
Blockx 1-0 Zverev*
Jamie Murray
Seven-time Grand Slam doubles champion on BBC One
The interesting thing about Alexander Zverev is that he has been to each of the Grand Slam finals except for Wimbledon, where he has only ever reached the fourth round.
We have done a deep dive into the reasons behind that and one of the main things is his second serve returns, which has been a limiting factor for him. His inability to return closer to the baseline, in comparison to Jannik Sinner and Carlos Alcaraz, allows his opponents to step into the baseline and put weight behind returns.
