Federico Gomez has game point but dumps his backhand into the net for deuce.

He does the same thing on the forehand to hand Jack Draper a break point.

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

Blimey! Gomez has got a sledgehammer of forehand.

The Armstrong crowd are enjoying watching the Argentine qualifier knock seven bells out of the ball - especially the large numbers of Spanish speakers here in New York City.

Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

Madison Keys is putting up a great fight and Renata Zarazua will be thinking about all of the chances she has had. Even if there weren't as many, it would still be tough.

She will have to serve again here - and it will kind of feel like she is starting all over again.

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Brilliant defence from Jack Draper but great hitting from Federico Gomez and he nails the overhead smash volley.

The Argentine is slightly unlucky as his shot drops wide after hitting the net but a weyward backhand from Draper pulls him level at 30-30.

Another rapid hold to love from Jack Draper.

He's in no mood to mess around behind his own serve and very much keen to get cracking on the Federico Gomez serve.

I imagine lots of you will be willing the Brit on so you can change over to the football in around 10 minutes...

Federico Gomez takes a tricky hold and makes that lead on the scoreboard look pretty significant.

Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

Madison Keys still has to serve to stay in this. When you're trying to close out a match at this time, sometimes when you have just been broken and you have to return it does relax you a bit. It is almost a free swing.

We will see how that helps Renata Zarazua and how Madison Keys recovers from that. What a great break though, she needed that.

Madison Keys is two points from defeat but manages to eke out a break point, which she converts.

But with the match approaching the three-hour mark, fatigue could well be an additional factor in this unpredictable encounter.

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Jack Draper responds with a hold to love of his own after the change of ends.

He's got work to do if he wants to take this in straight sets.

Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

Madison Keys' body language is a bit concerning.

She looks a little bit frustrated, and I understand why that is, but she is really going to have to turn that around here.

Wow. A hold to love for Federico Gomez. What a start to this third set for the Argentine qualifier.

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Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

Federico Gomez could have wilted in the face of a two set deficit, so it is really nice to see how tough he is staying here.

He finds himself up a break now!

Madison Keys' first double fault of the third set couldn't have come at a worse time as it gives Renata Zarazua a break point.

And a wild backhand from the sixth seed means Zarazua will now be serving for the match.

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Well, well, well.

The perfect start for Federico Gomez as he breaks at the first opportunity. Last time he got the break the Argentine was immediately broken back.

So the next task here is for him to consolidate.

Hello.

Jack Draper's serve demons are back. Another double fault hands Federico Gomez break point.

At 3-3 in the final set, both players have amassed 108 points each, and it really is too hard to call.

But once again, Renata Zarazua holds serve comfortably to edge ahead of Madison Keys.

The 27-year-old Zarazua is just two games away from the biggest win of her career, and from causing the biggest upset of the tournament so far.

Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

You can't tell Federico Gomez is down two sets by his body language. That's a good start and something we want to see.

It is tough to stay mentally strong, especially if you're looking at the score, but for him to even have a chance of coming back into this match he has to have good body language and be his own biggest fan.

Jack Draper will be very keen to get this done in straight sets.

The British number one will need to shake off that earlier wobble on serve.

Federico Gomez puts his first service game hold on the board.

Asia Muhammad
Women's Doubles World No.17 on BBC Radio 5 Sports Extra 2

The end of that second set got a little bit choppy for Jack Draper, but it is good that he was able to pull something out, find his way and make some first serves.

That's just going to all add up to better things hopefully in this third set and the next rounds.

After two comfortable holds, Renata Zarazua has to fight harder in the fifth game but still comes through.

Madison Keys' coaching box are telling her to go into the net more, but she looks a bit lost out there, with another couple of forehand errors seeing her slip behind in the set.

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