Michael Emons
BBC Sport at Wimbledon

What a start for the underdog as Pedro Cachin, after saving a break point in his opening service game, then breaks the Djokovic serve a few minutes later.

Cachin has already produced a couple of stunning passing shots and a loud roar from the Wimbledon crowd and a start no one saw coming.

Zhu Lin looks a completely different player in the second set, holding to love.

She's then gifted two break points through an Iga Swiatek foot fault but the top seed snuffs out the chance, serving well and winning the next four points to hold.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Live

It feels like mission impossible against the world number two. Novak Djokovic has not lost on Centre Court since Andy Murray beat him in that final in 2013.

Wow, what a shot that is from Cachin!

The Argentine lifts the ball over the advancing Djokovic and finds the line to set up his first break point of the match.

Unbelievable. A double fault from Djokovic. Who'd have thought?

The excitement builds around Centre Court. Cachin has made an early impression...

Image source, Reuters

The Centre Court crowd, as always, are getting behind the underdog and trying to offer as much encouragement as they can in the opening exchanges.

Novak Djokovic cuts a sliced backhand into the net to bring Pedro Cachin into contention at 40-30, and that's long from the reigning champion!

Deuce.

Jonathan Jurejko
BBC Sport at Wimbledon

One-way traffic into Centre Court.

Things have got much busier as the action starts on the show-courts.

The queue just before Djokovic came out snaked all the way down three flights of stairs from the upper deck of Centre to the ground level entrance.

Feels like this is a knock-on effect of the increased security checks.

Image source, BBC Sport

Novak Djokovic isn't hanging around at the start of this match.

The Serb is already applying pressure on Pedro Cachin, creating a break point, but the Argentine rises to the challenge and the crowd make their appreciation clear as he fights back to hold.

Top seed Iga Swiatek doesn't have to wait too long to take the first set. She holds to 30 with a crosscourt forehand winner to go a set up inside 35 minutes.

Image source, Getty Images

BBC One

In addition to BBC Two coverage, BBC One is also about to switch to Wimbledon coverage.

There you will find reigning men's singles champion Novak Djokovic's match against Pedro Cachin.

You can also watch both channels at the top of this page.

Jonathan Jurejko
BBC Sport at Wimbledon

Image source, BBC Sport

Possibly the biggest cheer of the day so far on Court One.

That’s because Zhu Lin has finally got her side of the scoreboard ticking after 32 minutes

Swiatek has been utterly dominant and it looked like Iga’s Bakery was already open for business.

It still might be. But dishing out breadsticks rather than the bagel.

Comfortable start for seven-time Wimbledon champion Novak Djokovic as he holds serve in the opening game on Centre Court.

Johanna Konta
Former British number one on BBC TV

It's a combination of a few mistakes but that feeling that Swiatek is always there. Even the few points she misses, she is always there with the focus or intention of what she wants to do.

The crowd are up on their feet on Court One to applaud Zhu Lin who finally gets on the board, saving two set points and squeaking to a hold.

Iga Swiatek has looked in stunning form so far this afternoon though, and isn't too bothered about missing out on a bagel.

Image source, Getty Images

Michael Emons
BBC Sport at Wimbledon

Image source, BBC Sport

Another Wimbledon tradition is that the reigning men’s champion kicks off proceedings on Centre Court and that’s what we have today with Novak Djokovic against 28-year-old Argentine Pedro Cachin first up.

Djokovic has won this title seven times, aiming to equal Roger Federer’s record of eight and also join Federer and Bjorn Borg in winning five consecutive championships.

The Serb’s record on Centre Court is an incredible one as he has not lost there since the 2013 final which gave Andy Murray the first of his two Wimbledon successes.

Djokovic has only lost twice at Wimbledon since then, in 2016 and 2017 with both defeats coming on Court One.

Cachin, ranked 68th, made the third round of the US Open last year but this will be his main draw Wimbledon debut and if he wins today it’ll go down as one of the biggest shocks in the tournament’s history.

Image source, BBC Sport

Image source, Getty Images

Novak Djokovic’s coach Goran Ivanisevic was asked to sum up the Serb’s on-court mindset as he bids to equal Roger Federer’s record of eight Wimbledon titles and remain on track for a calendar Grand Slam.

"He takes your legs, then he takes your soul, then he digs your grave and you have a funeral and you’re dead. Bye bye, thank you for coming," Ivanisevic summed up.

Cheery stuff, Goran, thanks for that.

Michael Emons
BBC Sport at Wimbledon

Image source, BBC Sport

We are at close to full capacity on Centre Court and a great reception for both players as they make their way out.

The sun is shining, the roof is open and we have our first match on Centre.

Novak Djokovic has not lost here in 10 years but faces an opponent with nothing to lose and everything to gain today. Will it be a career-changing few hours for Argentina’s Pedro Cachin?

Image source, BBC Sport

There seems to be quite a few of you talking about having problems in the Queue to get into Wimbledon...

Dan: Queue an absolute shambles so far. Stewards and punters alike saying it’s the worst it’s ever been. We arrived at 6:15 and haven’t even left the pre-queue park!

Anon: I was looking forward to a day of tennis but I'm still waiting in Wimbledon Park in the queue. Apparently less than 500 people are getting through security per hour. Britain can't even be proud of queueing any more!

Dave: Been in the Wimbledon queue since 5:30am, still not in and no idea when. Disgraceful.

Image source, Getty Images

Michael Emons
BBC Sport at Wimbledon

Image source, BBC Sport

Novak Djokovic already has won the Australian Open and French Open in 2023 - and he hopes Wimbledon will be the third leg of the calendar Grand Slam.

He has won this event seven times, including six of the last eight editions and will have been delighted when he saw Friday’s draw.

Seeded second, behind world number one Carlos Alcaraz (who Djokovic beat in four sets at Roland Garros last month), Djokovic, if he advances, will not have to play a player inside the top 30 of the world rankings until the fourth round at the earliest.

Indeed, seventh seed Russian Andrey Rublev is the only player in the top 10 in Djokovic’s quarter of the draw, while Nick Kyrgios, last year’s runner-up, was in that quarter but withdrew late last night because of a wrist injury.

The winner of this tie will face either Australia’s Jordan Thompson, 70th in the world, or American Brandon Nakashima, ranked 55th.

Looking further ahead, three-time Grand Slam winner Stan Wawrinka, now 38 and down at 88th in the rankings but who beat Andy Murray in an event at Bordeaux in May, is a potential third-round opponent.

Jessica Pegula had two match points saved by fellow American Lauren Davis in the second set, but the fourth seed is rallying in the decider.

Having lost on her serve in the first game of the third, she broke back and, after trading a couple of games, she's broken Davis again this time to 15.

She's now serving for a spot in the second round.