Magda Linette has not come here as early-round fodder.

She gets to 40-0 via tack- sharp forehand winner, but her second serve is swatted away as Petra Kvitova reels her back to deuce.

Here comes a break point...

And the Czech seed makes hay with another whopper of a return...

Image source, Getty Images

Eighth seed Kei Nishikori is an early break down against American Steve Johnson, while it remains on serve in the other men's singles match to have got under way - Sam Querrey is currently 2-3 down against Australian John Millman.

Petra Kvitova wallops her way to another hold of serve, before ripping the top off a sachet of isotonic gloop.

Three games in, but I think she is building the carbohydrate stores for the battle to come.

Jonathan Jurejko
BBC Sport at Wimbledon

Image source, BBC Sport

Those down at the practice courts - including many junior players who have arrived - have got a treat.

First, Rafael Nadal. And then, Andy Murray.

"One more Andy!" laughs Rafa as the Scot skulks behind him on the baseline.

Time violation Mr Nadal...

As Nick Kyrgios observed yesterday it is always manana, manana in the Spaniard's world.

Petra Kvitova clambers into a forehand return and swats a mighty cross-court winner to bring up 30-40 and the first break point of the match.

Magda Linette's bodyline serve drags it off the table though.

Some fine court craft from the Pole on the next point as she creeps up court and bops away the backhand volley.

And Kvitova pokes long to let her off the hook.

Sonia Oxley
BBC Sport at Wimbledon

Two hours til probably the biggest match of Harriet Dart’s life...

And here she is practising on the court next door to the player she will be facing - world number one Ashleigh Barty.

No furtive looks across at each other yet. Friendly neighbours for now.

Image source, BBC Sport

Petra Kvitova splatters a fine backhand winner after losing the first point.

A bit of pressure from Magda Linette as she sneaks back to 40-30, but Kvitova's big tee-off gets her out of trouble.

Hold.

The players are out on the court. The stands still are filling up slowly but surely.

Kvitova has won the toss and has opted to serve.

A little about Magda Linette. This is the first year that she has won a main draw match at Wimbledon after losing in the first round in her four previous campaigns. Her upset of highly-rated American teenager Amanda Anismova was the best result of her season rankings-wise.

She lost her only previous meeting with Kvitova back in 2016 on the hard courts of Montreal 6-1 6-2.

Image source, Getty

On Court Two this morning, two-time Wimbledon champion Petra Kvitova takes on Polish world number 75 Magda Linette.

Kvitova may a good career record at the All England Club, but she has not been so hot in recent years. She has gone out at the third round or before in each of her four campaigns since winning here in 20145.

BBC Two

Right, an action-packed Saturday at the All England Club is just getting under way.

Don't miss a minute - join us over on BBC Two now.

• Petra Kvitova v Magda Linette
• Elise Mertens v Wang Qiang
• Alison Riske v Belinda Bencic
• Carla Suarez Navarro v Lauren Davis
• Sam Querrey v John Millman
• Kei Nishikori v Steve Johnson

Image source, Getty Images

Harriet Dart had never won a match at Wimbledon until this year, but now finds herself under the spotlight of playing on Centre Court in front of 15,000 people at the All England Club.

The British number four, who is ranked 182nd in the world, will want to fare better against French Open champion Ashleigh Barty than she did on her last appearance in a major arena - a 6-0 6-0 drubbing by five-time Grand Slam winner Maria Sharapova on Rod Laver Arena at the Australian Open in January.

"I'm just learning from all these experiences I'm having this year. Everything is still pretty new for me," Dart said.

"This is my second Wimbledon. I'm still finding my feet. I'm definitely proving that my tennis is right up there with the level.

"I'm just doing the best that I can. I'm just really excited to play my next match."

Sonia Oxley
BBC Sport at Wimbledon

While they are waiting for the action to start, there are a lot of people gathered on court 14 where Tim Henman is among those having balls hammered at them by a group of youngsters.

Not really sure who’s got the upper hand...Tim looks like he’s running for cover here!

Image source, BBC Sport

Image source, PA Media

Dan Evans has enjoyed a successful grass-court season in the run-up to Wimbledon, winning titles at Surbiton and Nottingham, and has played with confidence in his run to the last 32.

Now the world number 61 faces Portugal's Joao Sousa, ranked eight places lower, as he bids to reach the last 16 for the first time at SW19.

Evans was tearful after beating Georgian 18th seed Nikoloz Basilashvili, emotion getting the better of him after his best run at a Slam since returning in April 2018 from a one-year ban for a positive cocaine test.

"It was a goal to be in the main draw here. I did that. Obviously I missed out the last few years," he said.

"There's plenty more tennis to be played in this tournament, so I won't be resting on that win."

Philip West: Federer is going to have to step it up several levels today. Pouille is a dangerous opponent, and, as blasphemous as it sounds, I haven’t been convinced by Federer one iota so far.

Fred Weimer: Re-watched Fridays #Wimbledon, external match between Coco Gauff & Helena Hercog. What a comeback, amazing to watch

Peter Burnell: Watching highlights of Nick Kyrgios last night on #bbctennis, external. Absolute gold in my opinion! It’s refreshing to see an individual within sport express their true feelings rather than hide behind a fake image.

Which game are you most looking forward to today? Where do you think the shocks will come? Get in touch using #bbctennis or drop us a text on 81111!

Image source, Getty Images

Right, back to today... British number one Johanna Konta is chasing a hat-trick of victories over 2017 US Open champion Sloane Stephens this summer, having beaten her twice on the clay at the Rome Masters and at Roland Garros.

Yet Konta, who reached the 2017 Wimbledon semi-finals, played down any suggestion she is the favourite when they meet on the grass.

"I don't see it like that," said Konta, who also beat Stephens on the Brisbane hard court in January.

"From having played her recently, I've got a fresh take on what her ball is like, what it's like to be on court against her.

"In terms of the challenges that come in the match, they will be different than they were in Paris, Rome or Brisbane. One, we're playing on a different surface. Two, we're constantly adapting, trying to find different ways to challenge each other.

"It's going to be a tough match. There's no guarantees for it to go my way and no guarantees for it to go her way. I'm just looking forward to playing that game."