We're back under way on Arthur Ashe Stadium and Zheng Qinwen gets right back to work with a glorious forehand winner past Iga Swiatek, who had come in to the net.

The Chinese world number 121 wraps up the game as Swiatek drags a forehand wide.

Mirra Andreeva secures the first hold of the third set - just.

It's very nearly a fourth break on the trot after two double-faults from the 19-year-old.

But she stands firm, gets back to deuce and is then helped by a couple of loose forehands from Anastasia Potapova.

The 24th seed digs in from 15-30 to secure a hold of her own but Andreeva remains a break up.

Image source, Reuters

The physio is working on Iga Swiatek's thigh so I can only assume that's where the problem is.

Hopefully the issue is not serious enough to affect her performance.

You get three minutes for a medical timeout but Swiatek ran on court with 40 seconds remaining, so that's positive.

Image source, Reuters

Superb from Mirra Andreeva and she quickly regains the advantage in the third set.

Having brought up break point, the French Open champion is right up against it with Anastasia Potapova throwing everything at her.

But Andreeva's defence is rock solid, she stays in the point and eventually Potapova plinks a forehand into the net.

Image source, Reuters

Iga Swiatek is pushed right back by the power of Zheng Qinwen's forehand but she recovers well to win the point.

The Polish eighth seed goes on to secure the hold to edge ahead again at the start of this second set.

We've got a short delay now with Swiatek calling for the physio. I'm not sure what the problem is just yet.

It's the perfect start to the third set for Mirra Andreeva as she breaks... only to see Anastasia Potapova break straight back.

Potapova was getting more and more frustrated - and goes round the net to rant at her box after fluffing an overhead volley to concede the break.

But that seems to do the trick and she gets things back on serve by breaking to love. A couple of wild shots from Andreeva in that service game.

Zheng Qinwen is showing the form which helped her win an Olympic gold medal and reach the Australian Open final in 2024.

It's a confident service game and she wraps it up with a forehand winner across court.

Iga Swiatek needed that after losing seven games in a row in that first set.

Zheng Qinwen applied the pressure again but at 40-30 Swiatek stepped into the court to put away a forehand volley and secure the hold.

Image source, Reuters

We're going the distance on Louis Armstrong.

Mirra Andreeva has clicked into gear late in this second set to take it away from Anastasia Potapova.

The fifth seed takes it to deuce on the Potapova serve and although the Austrian digs out a hold, Andreeva gets the set won on serve.

One set to determine who will make it through to the quarter-finals.

Daniela Hantuchova
Former world number five on BBC Radio 5 Sports Extra

This is just incredible. Zheng is in this incredible mode of 'this is what I do and on any given day, I can come back from five-nil down'.

Iga made a few double faults and dropped her intensity a little bit, but it was all on Zheng's racquet.

Image source, Reuters

If you watched Zheng Qinwen's third-round match you'll know she loves a comeback and we're witnessing another right here.

An ace down the middle is later followed by a forehand winner to bring up three set points, and she converts them at the first opportunity with a strong first serve.

Iga Swiatek is shell-shocked.

Daniela Hantuchova
Former world number five on BBC Radio 5 Sports Extra

This is just incredible and I am loving the reaction between each point. Zheng does not look like she has just come from 5-0 down.

A few nervous murmurs drift round the crowd as Iga Swiatek double faults before Zheng Qinwen's backhand winner down the line is greeted by a roar.

Zheng brings up break point as Swiatek finds the net and it's converted as the Pole double faults again.

After being 5-0 down Zheng will now serve for the first set.

Remarkable.

Image source, Reuters

Mirra Andreeva is a break up in this second set again - and now just two games from levelling the match.

To add to Anastasia Potapova's frustration is the fact that it's a double-fault that gifts the fifth seed the break.

These two are putting everything into their shots at the moment and the rallies are a joy to watch.

Zheng Qinwen shows superb defence to keep the ball in play and is rewarded as she then outplays Iga Swiatek.

Zheng goes on to hold with a forehand winner to complete the comeback from 5-0 down.

The crowd on Arthur Ashe Stadium are loving this.

Daniela Hantuchova
Former world number five on BBC Radio 5 Sports Extra

Zheng's team are on their feet now, they know that she has what it takes to come back in this first set and the crowd know too.

She is doing such a great job of putting Swiatek under pressure.

Image source, Getty Images

From 5-0 down to 5-4!

Zheng Qinwen breaks back again as Iga Swiatek can't keep her shot in play.

I did not see this coming around 10 minutes ago.

A groan of frustration from Iga Swiatek as a wide backhand gives Zheng Qinwen break point but she can't convert it as a forehand goes long.

Swiatek then skews a forehand down the line wide and the Chinese world number 121 has another chance to break.

Daniela Hantuchova
Former world number five on BBC Radio 5 Sports Extra

Swiatek hit the net there. It was almost like she she didn't know how to get ready for the volley, that is how uncomfortable she feels around the net.

She is looking very stressed.

Zheng Qinwen got one break back on Iga Swiatek's last service game - can she do it again?

There's nothing Zheng can do about that as Swiatek's forehand across court finds the line, before the Pole brings up a third set point.

Zheng just won't go away though, as a rasping forehand takes the game to deuce.