That's how to follow up a double fault - with back to back aces.

Edmund holds, and now Anderson will have to serve to stay in the set.

A break of serve to the good. It's a must-hold for Kyle Edmund.

He goes a point down, but a sizzling serve that fizzes wide out is too tricky for Kevin Anderson to find the target in reply.

Edmund eases his way into a 30-15 lead, only to double fault.

Mark Woodforde
12-time Grand Slam doubles champion on BBC Radio 5 live sports extra at Melbourne Park

Well played. He dictated from the moment he made the return of serve and he was able to push Anderson off the baseline. The rest of the point was forehands from Kyle Edmund.

Well, well, Kyle Edmund is trying his hardest but he just can't keep up with a Kevin Anderson crosscourt return and it's deuce.

But that's high, wide and not at all handsome from Anderson - another break point opportunity as Edmund takes the advantage.

Can he convert?

He moves Anderson left, goes on to his backhand again, and after hitting that corner for the third time, the South African sends his return long.

Edmund breaks!

Brief respite for Kyle Edmund, as the Anderson serve hots up once again - 30-15.

But Edmund gets on top from the next point to get the South African scuttling side to side behind the court, before clipping a return high into the air for Edmund to smash a winner.

And Edmund has a break point chance! He flies right, wraps his raquet around a wide ball and flings it back across court.

Kyle Edmund takes some water on board and shakes his head. Perhaps he's wondering how to get anywhere near that Kevin Anderson serve?

Anderson, from great height, powers down a second serve that bounces up towards Edmund's head, but like a Test batsman he finds a way to parry it.

And that's superb from Edmund, he recovers his footing to meet Anderson's response at speed and clip a backhand winner down the line.

Image source, AFP

French Open champion Jelena Ostapenko is into round two, having been pushed in the second set by 37-year-old Italian Francesca Schiavone.

The Latvian, 20, has come through 6-1 6-4, winning the last four games after Schiavone had been a break up.

Magdalena Rybarikova was the first winner of the 2018 Australian Open, the Slovakian beating Taylor Townsend 6-0 7-5.

Kyle Edmund wasn't too happy with that smash on his dart towards the net, but it drops inside the line to put him 30-0 up.

Edmund is serving well, and opens up a 40-0 lead before Anderson sends his backhand return long and the British number two holds.

Eleven points in a row on serve for Edmund.

Finally, if you're Kyle Edmund, Kevin Anderson misses a point - some 26 in a row he went on serve there, before sticking a loose backhand wide.

It's only a momentary disruption on the South African's way to holding serve once again.

Edmund reads the Anderson serve this time, but he's given the runaround and catches net with a weak backhand.

The Brit parries a block forehand back into centre court from the next serve, but Anderson opens up and strikes a fierce forehand winner - 30-0.

Image source, BBC Sport

There were groans from the British contingent, including Davis Cup captain Leon Smith, when Edmund dumped that second serve return in the net at 4-3 in the tie-break - a rare chance against the Anderson serve.

There’s plenty of time for an Edmund comeback, however, and seats on court three are still highly prized.

Wonderful backhand winner from Kyle Edmund, tickling the line as Kevin Anderson can only watch on from the other side of the court.

We're storming through this one.

Image source, Getty Images

Kyle Edmund couldn't get near that Kevin Anderson serve a moment ago, but he's not fazed.

He keeps chipping away at the South African and slides into a 40-lead himself.

Wowzer. Kevin Anderson is sending cannonballs down from about 11 feet.

He challenges an out call and is rewarded with the point, before storming into a 40-0 lead - untouchable.

And that's the game. Quick as you like.

Kevin Anderson is off target, and that's the first game of the second set to Kyle Edmund.

David Law
Radio 5 live sports extra commentator at Melbourne Park

You feel that Edmund has to get off to a good start in this set and keep Anderson at bay.

Right, what sort of response can Kyle Edmund muster to going a set down?

He takes the first point of the second set after Kevin Anderson sends a return to his second serve long, but there's a slight hesitation by Edmund on the next - and he double faults, his first of the match.

He didn't look happy with his toss at all there.

Good, clean groundstrokes follow as the pair enjoy a backhand exchange before Anderson catches one on the frame, and Edmund then goes 40-15 up.

Mark Woodforde
12-time Grand Slam doubles champion on BBC Radio 5 live sports extra at Melbourne Park

So close, but those final few points is where Anderson was willing to take a bit more of a risk by going for some big returns.

That's the first set to Kevin Anderson. The South African finds the breakthrough as he punishes Kyle Edmund on his serve in the tie-break to take the lead.

Edmund does well to engage Anderson on his serve, but it's the South African in control of that rally and eventually an Edmund return drops short.

Anderson then then thumps a forehand winner crosscourt - two set points.