Musetti, seeded 16, has taken the third-set breaker to lead Arnaldi by two sets to one; Shelton, seeded 21, leads Nakshima 7-6 7-5 6-5; and Popyrin and Moutet are locked into another brutal game, the clock ticking towards seven minutes when the Frenchman finally secures his hold for 2-1 in the first.

Yet more Italian excellence: Cobolli – a favourite of Coach Calv, our resident expert, who thinks he’s got the lot – leads Etcheverry 7-6. That breaker went to 10-8 and I’d not be surprised if we see a few more in a match that has potential to go on for epochs.

And another Italian, Lorenzo Sonego, has just gone in front against Stan Wawrinka – belieeeeve it’s taking a lot for me not to major on that match given we don’t know how many more times we’ll get to lap up the dishevelled Swiss – taking the third set 7-5. Meantime Popyrin finally secures his hold for 1-1 in the first against Moutet, and on Laver, De Minaur and Van de Zandschulp are under way.

Paolini, meanwhile, consolidates for 2-0 in the first, while Arnaldi and Musetti have just begun a third-set breaker. It’s quite something really how many excellent Italians there now are especially in the man’s game: Mario Berrettini beat Cam Norrie earlier today and there’s also Cobolli, Sinner and so on.

Moutet fights through a tough hold then forces Popyrin to deuce, swinging heavily top-spinning forehands; already, this looks like being a sapping contest both physically and mentally. The Frenchman is a an awkward customer, lacking power but not desire and running for everything before applying a tricky lefty angle. He’s also something of a wind-up merchant, but for now, he’s advantage down…

Paolini is so much fun to watch and she earns two break points immediately, and when Wei nets a forehand she leads 1-0.

Some latest scores:

• Musetti (16) and Arnaldi are level at a set apiece

• Shelton (21) leads Nakashima 7-6 7-5 4-3

• Bautista Agut and Shapovalov are warming up

• Sonego and Wawrinka are 1-1 4-4

• Etcheverry and Cobolli (32) are playing a first set tiebreak

So, which matches to watch? I’m going to go with Van de Zandschulp v De Minaur, Popyrin v Moutet, Arnaldo v Musetti and Wei v Paolini, I think – provided the various systems permit that.

Let’s begin with a result: Daniil Medvedev, seeded five, has survived a scare, beating Thailand’s Kasidit Samrej, a qualifier, 6-2 4-6 3-6 6-1 6-2. He meets Learner Tien of USA next.

Preamble