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
Kyrgios 3-6 1-0 *Nadal
Nick Kyrgios lands all five of his first serves, chalks up two aces and holds to 15.
When he is in that service groove, he looks untouchable.
Can he keep it up and also get stuck into the Nadal tee-off?
*S Williams 2-6 1-0 Juvan
The match starts now for Serena Williams. She breaks the Juvan serve at the first time of asking in the second set after losing the opener.
Image source, Getty Images
Jonathan Jurejko
BBC Sport at Wimbledon
Strongly suspect Rafael Nadal wanted to wind up Nick Kyrgios more than he wanted a tinkle.
And he's hit the target.
Kyrgios 3-6 0-0 Nadal
Boris Becker
Three-time Wimbledon champion on BBC TV
On Nick Kyrgios' complaints that Rafael Nadal is taking too long on serve...
We talk about Rafael Nadal as one of the greatest of all time.
He has earned his right to be a little different.
You have to earn that position.
This was Kyrgios's beef with Nadal's slow pace of play in the first set...
'Why am I waiting to serve?' - Tensions boiling over for Kyrgios
*Kyrgios 3-6 0-0 Nadal
Rafael Nadal puts his hand up and asked to be excused for a bathroom break at the end of the first set.
Nick Kyrgios definitely wouldn't have given him the hall pass.
"I'm serving next and he chooses to go now?" he asks the umpire.
Nadal is back and sits down. Kyrgios stands up immediately and is poised at the back of court.
S Williams 2-6 0-0 Juvan*
This was Serena Williams' bad start to the opening set, which she did not recover from.
S Williams 2-6 Juvan
Someone among Kaja Juvan's team is on his feet as the Slovenian takes the opening set. The final point of the set sees Williams netting after Juvan had tried to lob her.
World number 133 against a seven-time Wimbledon champion.
'Did not look good' for Serena as she goes a set down to 18-year-old Kaja Juvan
#bbctennis or text 81111 (UK only)
David Jones: Kyrgios is 100% correct. Don’t know why everyone just blindly accepts having to play at Nadal’s laborious pace - presumably because he’s won a lot. Server sets the pace. Them’s the rules
Jamie Brilley: Kyrgios is right about Nadal taking too long between serves. Would the umpire put up with it if the roles were reversed?
*Kyrgios 3-6 0-0 Nadal
Rafael Nadal jams a serve into the body of Nick Kyrgios and then pats away a volley to close out the set.
This is a long, long way from over though. Don't touch the dial.
Nadal takes control of the first set
Set point for Kaja Juvan against Serena Williams.
Image source, EPAJonathan Jurejko
BBC Sport at Wimbledon
Don't make him angry. Nadal laughs the sort of laugh you would do before you start to turn green after watching Kyrgios embarrass him with the underarm serve.
Unless he's laughing because he knows he's winding Kyrgios up.
Pretty sure I heard a few boos from the Wimbledon purveyors of etiquette...
#bbctennis or text 81111 (UK only)
Chris Goldsmith: OMG Nick Kyrgios underarm serve to Rafa Nadal on Centre Court, it's only set one! Cheeky
Kyrgios 3-5 *Nadal
Rafael Nadal finds the net and he has an awkward 30-30 serve to deal with to serve out...
Kyrgios 3-5 Nadal*
Todd Woodbridge
Former Wimbledon doubles winner on BBC TV
You can tell by Rafael Nadal's reaction that he didn't want something like that to happen.
He tried to move on quickly and didn't engage. A quick momentum switch.
Kyrgios 3-5 Nadal*
Boris Becker
Three-time Wimbledon champion on BBC TV
The Nick Kyrgios show has started.
*S Williams 2-5 Juvan
The Duchess of Sussex is among the crowd on Court One to watch Serena Williams.
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Kyrgios 3-5 *Nadal
First point, Nick Kyrgios challenges an out call on a first serve. Hawkeye shows it is marginally long.
A 143mph second-serve ace follows to pantomine jeers.
40-0 via a mighty lassooing forehand.
And an underarm serve that sneaks over the net to tap twice to round off the game!
It was that tactic that irritated Nadal in Mexico earlier this year.
Kyrgios whips out his signature underarm serve
*S Williams 2-5 Juvan
*Kyrgios 2-5 Nadal
"It's too long between serves. It's [expletive deleted]."
So says Nick Kyrgios between losing the first and second points of the game.
If the umpire heard that, he pretends he didn't.
Nick Kyrgios' box, which includes former finalist and friend Eugenie Bouchard, keep a poker face.
The are more fireworks to come in this. Kyrgios to serve with fresh fuzz next...