Match point Van de Zandschulppublished at 19:42 BST
*Choinski 3-6 1-6 6-6 (5-6) Van de Zandschulp
Botic van de Zandschulp has turned things around in the tie-break and he's rewarded with a first match point with a one-two punch off a wide serve.
US Open day four
GB's Francesca Jones beats Magda Linette 6-4 1-6 6-3 in heavily delayed first-round match
Katie Boulter beaten 6-1 6-0 by Wimbledon finalist Karolina Muchova in second round
Jan Choinski and Jacob Fearnley also beaten, Toby Samuel still to play
Jessica Pegula and Daniil Medvedev both progress with straight-set wins
Defending champions Aryna Sabalenka and Carlos Alcaraz play overnight
Emily Salley, Elizabeth Botcherby, Paul Battison and Melissa Edwards
*Choinski 3-6 1-6 6-6 (5-6) Van de Zandschulp
Botic van de Zandschulp has turned things around in the tie-break and he's rewarded with a first match point with a one-two punch off a wide serve.
*Choinski 3-6 1-6 6-6 (4-4) Van de Zandschulp
Jan Choinski is on a roll from the baseline as he opens up a 4-1 lead, but Botic van de Zandschulp closes the gap with the help of an overhead winner and a poor Choinski miss. 4-4.
Fearnley 3-6 1-3 Etcheverry*
A second break of the set for Tomas Martin Etcheverry.
At 15-40, Jacob Fearnley comes into the net. Etcheverry lofts up a forehand lob and the back-tracking Brit puts his backhand overhead into the base of the net. I haven't seen the replay but I think that lob might have been drifting into the tramlines...
*Choinski 3-6 1-6 6-6 (3-1) Van de Zandschulp
A superb first-serve return from Jan Choinski puts Botic van de Zandschulp on the backfoot and he can't recover the point.
He gets the next one before forces another miss from the Dutchman with a series of blazing backhands.
Choinski 3-6 1-6 6-6 (1-0) Van de Zandschulp*
The ball pops up nicely for Jan Choinski off the net and he takes control of the rally, which eventually comes to an end when Botic van de Zandschulp shanks a forehand wide.
*Fearnley 3-6 1-2 Etcheverry
How many times has Jacob Fearnley failed to locate the baseline with a simple forehand? 0-30.
Double fault. Cover your eyes. 0-40.
*Choinski 3-6 1-6 6-6 (0-0) Van de Zandschulp
Botic van de Zandschulp holds serve and that means we're going to a tie-break.
Still all to play for Jan Choinski, who has battled hard in this third set to keep his chances alive.
*Fearnley 3-6 1-2 Etcheverry
Aaaaaand we're back on serve in the second set (although for how long is anyone's guess).
Tomas Martin Etcheverry tries the Woodforde, rushing the net, but is beaten on his backhand side by a pinpoint pass.
Image source, Getty ImagesFearnley 3-6 0-2 Etcheverry*
Ace. Double fault. Rather sums up this match.
The pair trade points for 30-all before Tomas Martin Etcheverry nets a routine forehand.
Break point!
Choinski 3-6 1-6 6-5 Van de Zandschulp*
Good work from Jan Choinski as he hammers home a couple of huge serves, along with a deft sliced volley at net.
He will - at the worst - face a tie-break for this third set.
Fearnley 3-6 0-2 Etcheverry*
Vocal frustration from Jacob Fearnley as he wastes advantage with a loose backhand.
But in the end, he's a little unlucky to be broken, with an unhelpful net cord pinging his forehand into the tramlines.
It's starting to feel like a long way back for Fearnley...
Image source, Getty Images*Choinski 3-6 1-6 5-5 Van de Zandschulp
Wary of Jan Choinski's 5-6 lead, Botic van de Zandschulp ups the aggression to make sure he gets through his service game safely and avoids gifting a set back to the Briton.
On we go!
*Fearnley 3-6 0-1 Etcheverry
Break point number two - saved! And once again, success on the approach culminating in a backhand volley winner.
More of that, please, Mr Fearnley. Gold star for Mr Woodforde.
*Fearnley 3-6 0-1 Etcheverry
A short while ago, Mark Woodforde called for Jacob Fearnley to mix things up a bit. Granted, it wasn't his choice to come into the net on this occasion but he was swiftly up to the drop shot and then buried a volley winner. 15-30.
Two points later, he actively attacks the net and converts the second of his two smashes to save a break point.
But there's still one to go...
Choinski 3-6 1-6 5-4 Van de Zandschulp*
Harriet Dart has already made it into the second round and will play tomorrow, but she's taken some time to come and watch her fellow Brit Jan Choinski as he also sees his service game out from 30-30.
A break now would be nice for the 30-year-old.
*Choinski 3-6 1-6 4-4 Van de Zandschulp
Jan Choinski is looks like he's getting closer to doing something on Botic van de Zandschulp's serve, but the Dutchman closes up shop once again from 30-30.
Image source, Getty Images*Fearnley 3-6 0-1 Etcheverry
A brisk hold to 15 from Tomas Martin Etcheverry to open the second set. The shortest service game of the match by a distance.
Fearnley 3-6 0-0 Etcheverry*
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Live
Etcheverry's numbers were certainly a little brighter than Fearnley's in the serving department. Winning a bit more behind the first serve when they landed, and striking enough winners from the back of the court as well.
Choinski 3-6 1-6 4-3 Van de Zandschulp*
Maybe there is hope for Jan Choinski! His first love hold of the match.
Fearnley 3-6 0-0 Etcheverry*
It's not been a high quality first set out on court 12 but Tomas Martin Etcheverry won't care. The Argentine clenches his fist and shouts as he watches Jacob Fearnley's backhand flump into the net.
He takes the first set 6-3, breaking the Brit's serve three times.
Both players should be concerned by the unforced error count - 15 for Etcheverry, 17 for Fearnley - but the latter should be particularly worried by his serve. Five double faults in the set, and more than once his serve failed him on a big point.