First set: Djokovic 4-1 Griekspoor* (*denotes next server)
Djokovic consolidates the break with another love hold, capping it with a 121mph ace. He’s won 10 straight points on his serve.
Djokovic breaks in fourth game of first set!
First set: *Djokovic 3-1 Griekspoor (*denotes next server)
Another uncomfortable service game for Griekspoor, who’s makes a couple of unforced errors off the forehand for 30-all. On the next point, a 24-shot rally breaks out than ends when Djokovic comes to net for a forehand volley winner. The first break-point chance of the night for either player and Djokovic coolly converts it to draw first blood.
First set: Djokovic 2-1 Griekspoor* (*denotes next server)
That was quick. Djokovic goes 98mph ace out wide, 121mph unreturnable, 124mph ace down the middle then comes to net to cap the love hold with an overhand forehand volley, getting all four first serves in along the way.
First set: *Djokovic 1-1 Griekspoor (*denotes next server)
Griekspoor pounded 30 aces in his first-round win including one that clocked in at 149mph. He’ll need a similar effort tonight if he hopes to spring the upset. The Dutchman falls behind love-15, then 15-30, but pushes it to deuce. It’s a bit of a handful, but he holds while avoiding a break point chance in a 10-point opening service game.
First set: Djokovic 1-0 Griekspoor* (*denotes next server)
Djokovic will serve to start and quickly falls behind love-15 after mishitting a forehand from behind the baseline. He follows with a 118mph ace to the body and a 102mph service winner out wide, but then double-faults for 30-all. From there he cracks an unreturnable serve, then hits a forehand volley winner on the next point to hold in his opening service game.
The biggest upset of the tournament so far happened about an hour ago. The American pair of Nathaniel Lammons and Jackson Withrow, a wild card in the men’s doubles, won 6-2, 7-5 over top seeds and newly minted Olympic gold medalists Nikola Mektic and Mate Pavic.
Tomorrow’s order of play has arrived. Here’s what’s on tap for the biggest courts on Friday:
Arthur Ashe Stadium
Day session (12pm local time)
• V Azarenka (BLR)  v G Muguruza (ESP)  • C Alcaraz (ESP) v S Tsitsipas (GRE) 
Night session (7pm local time)
• L Fernandez (CAN) v N Osaka (JPN)  • A Rublev (RUS)  v F Tiafoe (USA)
Louis Armstrong Stadium
Day session (11am local time)
• E Rybakina (KAZ)  v S Halep (ROU)  • P Andujar (ESP) v D Medvedev (RUS)  • A Kerber (GER)  v S Stephens (USA)
Night session (7pm local time)
• R Bautista Agut (ESP)  v F Auger-Aliassime (CAN)  • D Collins (USA)  v A Sabalenka (BLR) 
Hello and welcome to Flushing Meadows for tonight’s second-round match between Novak Djokovic and Tallon Griekspoor. The best player in the world and top seed in the men’s draw is back in Arthur Ashe Stadium as he continues his quest for a record-setting 21st major championship and the first calendar-year grand slam by a men’s player in more than five decades. Standing in his way tonight is Griekspoor, the world No 121 from the Netherlands who this time last week thought he’d have to miss the season-ending grand slam due to visa issues. History would favor Djokovic: he’s 52-1 at major tournaments against opponents ranked outside the top 100, including 12-0 at the US Open, and he’s never lost before the third round in Queens.
The players should be on court for their warm-up in the next 15 minutes or so.