Andy Murray wins men's doubles first-round match with Pierre-Hugues Herbert
Murray's first match at Wimbledon since 2017 after career-saving hip surgery
Jamie Murray and Neal Skupski doubles match suspended - bad light
Rafael Nadal beats Nick Kyrgios 6-3 3-6 7-6 (7-5) 7-6 (7-3)
Defending champion Angelique Kerber beaten by 'lucky loser' Lauren Davis
Serena Williams beats Slovenian qualifier Kaja Juvan 2-6 6-2 6-4
Johanna Konta, Dan Evans and Harriet Dart win but Cameron Norrie loses
Roger Federer beats GB's Jay Clarke
*Siniakova 3-6 3-3 Konta
Konta gets a bit of help from the net chord and Siniakova wobbles. 15-30.
The Czech hits the ball long and it's two break points. She practically kneels down to hit a backhand winner and save the first.
Then sprints forwards to the net and catches Konta off guard, saving the second.
That loss for 13th seed Marin Cilic means there are only two other seeded players - 12th seed Fabio Fognini and 20th seed Gilles Simon - in the same quarter of the draw as third seed Rafael Nadal.
The Spaniard, who was unhappy at only being seeded third when he is second in the world rankings, faces unseeded and volatile Australian Nick Kyrgios later today.
Federer 6-1 7-6 (7-3) Clarke*
Thumping ace from Roger Federer and that wraps up the second set for the Swiss, who hasn't had it all his own way.
Federer clinches the second set
*Federer 6-1 6-6 (6-3) Clarke
Clarke saves the first, three to go...
Federer 6-1 6-6 (6-2) Clarke*
Jay Clarke drops a forehand into the tape and that's four set points for Roger Federer.
*Siniakova 3-6 3-3 Konta
Konta takes a minute before she begins her usual pre-serve ritual (three high bounces, two low bounces and serve in case you're wondering). She's not distracted, though, and hits an ace.
She finishes the game how she started it, winning with an ace down the middle.
Cilic 4-6 4-6 4-6 Sousa
The 2017 runner-up is out.
Marin Cilic, who lost 6-3 6-1 6-4 to Roger Federer in the final two years ago, has just been beaten 6-4 6-4 6-4 by Portugal's Joao Sousa on court 12.
Sousa, who knocked out British teenager Paul Jubb in the opening round, faces another Briton in round three with Dan Evans his opponent.
Federer 6-1 6-6 (5-2) Clarke*
Roger Federer accelerates into a 5-2 lead.
*Federer 6-1 6-6 (3-2) Clarke
Clarke's break is quickly wiped out and now it's Federer with the momentum.
Federer 6-1 6-6 (1-2) Clarke*
Wowsa! Roger Federer, simple forehand volley in front of him, slaps it into the net. Mini-break Clarke...
Golfing superstar Justin Rose is torn over what sport he should be watching today.
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Siniakova 3-6 3-2 Konta*
Siniakova has decided to make this a bit easier for Konta.
She hits a forehand long to give the Brit a 30-0 lead, but later manages to hold onto a smash and then it's Konta who can't find the court.
#bbctennis or text 81111 (UK only)
Philip West: I first watched Federer at #Wimbledon, external in 2005, and I have never seen him looking as uncomfortable and as unsure of himself as he does now. This is very, very peculiar
*Federer 6-1 6-6 (0-1) Clarke
Lovely stuff from Jay Clarke. Advantage to the young British hopeful.
*Siniakova 3-6 2-2 Konta
Annabel Croft
Former British number one on BBC Two
Siniakova is just losing some control and she can't afford a level drop. She needs to keep the scoreline tight. It feels like she is running out of ideas tactically in how to play Konta.
Federer 6-1 6-6 Clarke*
Seamless from the Swiss. Working Jay Clarke across the baseline like a PE teacher dishing out the bleep test. Federer holds.
*Siniakova 3-6 2-2 Konta
Just a reminder of that first-set dominance:
Konta takes the first set in 32 minutes
*Siniakova 3-6 2-2 Konta
Is Konta losing focus a bit? All of her holds have been fairly straightforward so far but the 28-year-old hits a backhand into the net to go 15-30 down.
Konta recovers with an amazing angled backhand and Siniakova cannot return it on the run.
Another swift backhand on the baseline throws the Czech off and Konta gets the hold. It's not quite as dominant as it was, but Konta is still a set up.
#bbctennis or text 81111 (UK only)
For now, JoBerg, but to be rotated with EdMound (as performances dictate).
Phil, Derby
Mount Kilidanjaro?
Jack, london
You've got to call it the Konta Kop
Anon
Image source, EPA*Federer 6-1 5-6 Clarke
Roger Federer is left shaking his head. Jay Clarke hustles with some great defensive work and then the Swiss drops a backhand into the tape.
He follows it with another and Clarke is again one game away from taking the second set.