It looks like this second set could go the distance, as we’re 24 minutes played after four games. Zverev speeds things along with a love hold – more signs that his serve is improving.

A bruising rally from the baseline, the longest of the match at 21 shots, is finished wonderfully by Alcaraz with the forehand winner onto the line.

Zverev nets on the forehand return and turns to his box, venting in frustration. A good hold from Alcaraz.

A very similar game to the previous one as Alcaraz battles back from 40-15 to deuce, as Zverev fails to deal with the Alcaraz forehand.

Zverev lands a big first serve out wide, leaving Alcaraz no room to return from. Another big first serve from Zverev and he lands the smash.

He holds and will need to continue that serving into the second set.

A second break point for Zverev, as Alcaraz lets a lob drop inside the baseline, but Alcaraz replies with the one-two strike as he lands the forehand winner.

Double fault from Alcaraz! Zverev will have another look at break point: but the fourth seed once again can’t land his return.

Alcaraz pushes on the serve out wide, as Zverev fires wide on the forehand – another missed return.

Alcaraz makes no mistake! Backhand winner, fired from the hip! Alcaraz holds serve in 10 minutes. A huge moment early in this second set.

Now then. Alcaraz jumped into a 40-0 lead at the start of the second set, but suddenly throws away the lead as Zverev gets back to deuce. Alcaraz’s backhand lob drifts long and all of a sudden Zverev has a look at break point.

Alcaraz finds a first serve but Zverev can’t return! Chance missed. Zverev misses again on the backhand, pushing long, and has to restrain himself from smashing his racquet in frustration.

Zverev does well to follow in the forehand down the line, getting back to deuce.

A window for Alcaraz he meets a Zverev volley at the net and the German gets the ball stuck under his feet, but Alcaraz then cracks the net on the forehand.

30-30, but Zverev blinks on the foreand and fires long!

Set point to Alcaraz: and a winner to seal it! The ball sits up for Alcaraz in midcourt and the 21-year-old thrashes away the forehand winner to take the set!

There were nervous moment early on, but Alcaraz is loving this!

Lightning hands from Alcaraz! Zverev sensed a chance after racing to reach the drop shot and flick a forehand down the line, but Alcaraz was there to meet it on the volley.

Alcaraz then moves to 40-15 after controlling the forehand volley, met brilliantly after moving his feet. Alcaraz moves a game away as Zverev clips the netcord on the forehand crosscourt.

Alcaraz is enjoying this.

Sublime from Alcaraz, as Zverev continues to struggle. Alcaraz pulls the German in with a deft drop shot, as Zverev fails to clear the net. It’s 0-30, and Zverev’s first serve has gone missing, too.

Alcaraz finds great depth to the baseline and Zverev can’t adjust as his forehand sails long. There will be two more break points: Alcaraz defends brilliantly and had the chance to pass Zverev at the net! He grins, after netting on the forehand!

Stunning defence from Alcaraz again to retrieve the Zverev smash – only to net again on the backhand! Zverev hangs on to get to deuce.

ACE from Zverev – timely. And that’s a big hold as Alcaraz pushes the backhand out.

It’s all flowing Alcaraz’s way right now, with Zverev struggling from the baseline. Alcaraz is throwing all sorts of balls at him and the German is having to hit on the run, react to spin and different depths. Alcaraz isn’t having to hit many winners yet but holds to take a 4-2 lead in this first set.

A chance for Alcaraz, as the Spaniard becomes solid on the baseline to force Zverev into consecutive errors into the net. Three break points: Alcaraz finds a lovely angled forehand, and Zverev nets on the forehand on the run. He gets the break to love!