BBC Radio 5 Live

Thanks for being with us for our coverage of day two at the Australian Open.

Head to the BBC's tennis page for all of the reports, reaction and analysis of the action in Melbourne.

There's a special tennis programme on BBC Radio 5 Live and BBC Sounds from 21:00 GMT on Monday, and we'll be back on the BBC Sport website and app from 07:00 GMT with live text and radio commentary of more first-round matches.

Bye for now!

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We will see both defending singles champions in action on Tuesday as the first round of the Australian Open continues in Melbourne.

Madison Keys is the ninth seed at this year's tournament - she opens play on Rod Laver Arena at 00:30 GMT against Ukraine's Oleksandra Oliynykova.

Jannik Sinner, the second seed in the men's draw, takes on Frenchman Hugo Gaston in the first match of the night session on the same court.

Ben Shelton, Taylor Fritz, Naomi Osaka and Elena Rybakina are among the seeds who get their respective campaigns under way.

Great Britain's Katie Boulter and Sonay Kartal will hope to join three of their compatriots in round two.

Well that was another jam-packed day of first round action, wasn't it?

In the men's singles, 10-time Australian Open champion Novak Djokovic came through his tournament opener against Spain's Pedro Martinez in straight sets.

The Serb also reached 100 match victories at three of the four Grand Slams with his comfortable first-round win.

Daniil Medvedev claimed his first Grand Slam win in 370 days with a convincing 7-5 6-2 7-6 (7-2) victory over Dutchman Jesper de Jong on Margaret Court Arena.

British number three Jacob Fearnley failed to book his spot in the second-round though, after a disappointing 7-6 (7-2) 7-5 3-6 7-6 (7-3) loss to Poland's Kamil Majchrzak.

In the women's singles, Iga Swiatek began her bid for a career Grand Slam with a shaky 7-6 (7-5) 6-3 win over Chinese qualifier Yuan Yue.

Third seed Coco Gauff also progressed through to the second round with a dominant 6-2 6-3 victory against Kamilla Rakhimova.

But it wasn't to be for British number three Francesca Jones, who was forced to retire with a glute problem at 6-2 3-2 down against Polish qualifier Linda Klimovicova.

Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds

Image source, Getty Images

It really did surprise me - the level he began with.

It wasn't in every area of his game, we didn't see the whole Djokovic repertoire, but we saw a key ingredient, which was the supreme serving and that enabled him to get a number of winners from the baseline.

The serving display was exceptional.

BBC Sounds

The BBC Sport team in Melbourne will round up every day's play at this year's Australian Open in podcast form - head to BBC Sounds to listen or download.

Today's episode will be published this afternoon.

More from Novak Djokovic, speaking on whether he reflects on the ups and downs: "It does come more often in my mind in the last couple years as the end is nearer, lots of thoughts running in my mind but also I don't let myself hang out with those thoughts for too long. I don't have time.

"Life as a tennis player is a constant journey, there's a competition every week. I'm not playing as much as I used to but once the season starts, your mind is racing and there's always a next challenge - a next tournament, next competition. You really don't allow yourself to reflect too much. Hopefully when I put my racquet aside, sipping a cocktail on the beach, I'll reflect."

More from Novak Djokovic: "It always feels good at the beginning of the tournament. Let's see how I progress. Tonight's performance was definitely great, I can't complain about anything - I served very well.

"It's always a challenge to kickstart a tournament in the right way and on the right note and send a signal to yourself and all of the opponents watching you play.

"I have a couple of days without a match to recover my body. I'm using every hour to get my body recovered and in shape for the next challenge so let's hope for the best."

Image source, Getty Images

After a perfect day one, day two hasn't been as kind to the British contingent in Melbourne.

British number three Francesca Jones was left sobbing on court after struggling with a glute problem from the early stages of her first-round match.

The 25-year-old tried to continue but ultimately quit when trailing Polish qualifier Linda Klimovicova 6-2 3-2.

In the men's singles, Jacob Fearnley was beaten 7-6 (7-2) 7-5 3-6 7-6 (7-3) by Poland's Kamil Majchrzak.

The first-round defeat could see the British number three slip into the lower reaches of the world's top 100 - and falling outside of the top 100 would take away direct entry into future Grand Slam tournaments.

Novak Djokovic was imperious on serve today and he gave Pedro Martinez almost no chance of success.

He played 57 points on serve and lost just five.

And 77% of his first serves went in.

Serve like that and he can be a match for anybody.

Image source, Getty Images

Novak Djokovic, speaking on court about his 100th Australian Open match win after defeating Pedro Martinez: "What can I say? I like the sound of it - centurion is pretty nice, it's a nice feeling to be a centurion. I always give my best when I'm on the court.

"History-making is great motivation, particularly in the last five to 10 years of my career once I got myself into a position that I could eventually make history, I was even more inspired to play the best tennis and that's what I've done.

"I was very fortunate early on in my career to encounter people who taught me and guided me to play the long shot in my career, not burn out too quickly and to take care of my body and mind and try to have as long career as possible.

"I'm blessed to be playing at this level and another win here tonight is a dream come true."

Novak Djokovic says he feels "blessed" to still be playing at the highest level of tennis.

I'm sure most tennis fans would say they feel "blessed" to be able to watch a 24-time Grand Slam champion play his very best tennis still.

That was a champion's performance.

Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds

I wonder whether Djokovic might have surprised himself with that level. We know he has a good handle on his level from practice matches but practice sets are practice - under the spotlight of a Monday night crowd, he has shone very brightly.

Pedro Martinez is a difficult first-round opponent so I think Djokovic is going to be alive well into the second week.

Novak Djokovic moves to within one game of his 100th match win at the Australian Open.

He is totally commanding the points and breaks serve at 15-40 with a stunning cross-court backhand return that never really looked on.

It is written in the stars.

I don't know what gear Novak Djokovic is in, but he definitely doesn't need to go up another.

The 10-time Australian Open winner cruises through another service hold to love, finishing it off with a wonderful ace.

He has won 100% of his serve points in this third set. That's domination if I've ever seen it.

There's the break!

Novak Djokovic is clearly keen to get this first-round win signed, sealed and delivered.

The Serb opened up a 0-30 advantage before Pedro Martinez won back-to-back points to reign the world number four back in to 30-30.

There was no stopping Djokovic once he was gifted a break point though. He had the Spaniard running left to right on the baseline before hitting a forehand long.

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Novak Djokovic is here to speed things up on his serve though.

The Serb takes another service hold to love to keep things on serve in this third set.

Martinez has played 84 points on serve compared to Djokovic's 48 points - just let that sink in.

If you are wondering why there was such a gap between the last two entries in this live text, it would be because that last game took almost 10 minutes to come to its conclusion.

Intense stuff.

As if we haven't been treated to enough deuce tussles in this match, Novak Djokovic brings up another one.

Pedro Martinez finally comes out on top after five deuce points, with the Serb overhitting a forehand and the Spaniard then dispatching a well-placed forehand winner.

There's shouts of 'let's go Novak, let's go' from the crowd. They are eagerly waiting for the Serb to claim his milestone moment on Rod Laver Arena.

Image source, Getty Images

It's easy as you like for Novak Djokovic though.

The Serb races to another service hold to love with lightning speed.

He is letting rip on forehand winner after forehand winner at the minute - premium showboating.

His sights are firmly set on an 100th match win at the Australian Open now.