While we were getting excited about Uruguayan wingers, Andy Murray saw off Jo-Wilfried Tsonga in straight sets to reach the US Open quarter-finals and claim his first top-10 win in over a year.

The Briton won 7-5 7-5 6-4 in humid conditions in New York, and goes on to face world number one Novak Djokovic in the last eight.

Read more here.

BBC Sport's Alasdair Lamont

"Celtic's hopes of signing John Guidetti on loan from Manchester City look to have been scuppered. They had hoped to add the Swede as well as Stefan Scepovic but the final details could not be processed before the Scottish FA's midnight deadline.

"Although there is a possibility the SFA can appeal to Fifa over the circumstances, for the moment it looks like the Serbian Scepovic will prove to be Celtic's only deadline day acquisition."

James in Basingstoke via text: Look, I started my night shift at 7pm. I've been looking at my phone ever since waiting for Falcao to sign. Really need to get some work done. Chop chop.

Sam in Devon via text: Surely something has happened with this Falcao deal, it was meant to be complete at 9.30pm. It's been hours now.

Faisal via text: Don't worry Manchester United fans. Taxi has taken Falcao to Manchester City's stadium by accident.

Image source, Getty Images

While we wait for the two big ones - here are some more big ones you may have missed:

Hull City have signed Uruguay striker Abel Hernandez from Palermo for a club-record fee, thought to be £10m

Crystal Palace have broken their transfer record by spending £7m to make Wigan midfielder James McArthur one of three deadline-day signings.

Manchester United striker Javier Hernandez has joined Spanish side Real Madrid on a season-long loan.

Manchester City's Micah Richards has ended his 12-year stay at the club by joining Fiorentina on a season-long loan deal.

Tottenham midfielder Lewis Holtby has signed for Hamburg on a season-long loan with a view to a permanent move.

For a full list of confirmed transfers throughout the day, visit our dedicated page on the BBC Sport website.

Where did Celtic get to in the end then?

They have completed the £2.3m signing of Serbia striker Stefan Scepovic from Sporting Gijon.

The 24-year-old has agreed a four-year contract just 24 hours after withdrawing from an agreement with the Scottish champions.

But a switch to Getafe collapsed, allowing Celtic to land the forward who scored 22 goals in the Spanish second tier last season.

Celtic are also working on a deal to sign Manchester City's John Guidetti.

You just don't mess with Dolph Lundgren.

Lady Laura NUFC:, external Why can't deadline day cut off time be 5pm!

Vincent Rynjah:, external Need sleep....bed very attractive right now....Manchester United gives us the news now.

Adeleye:, external Where is Falcao? Still waiting up.

I might go and watch the Expendables. Tweet me your number if you're still up and I'll give you all a bell if these deals go through...

Mo in London via text: Come on, hurry up with Welbeck, Arsene, so I can go to bed!

Jason in Kent via text: Do these people not realise we have to work later? Someone tell Falcao to hurry up and sign so Welbeck can sign for Arsenal and I can get some sleep!

Niall in Liverpool via text: This extra hour to sign Falcao is taking "Fergie time" a bit far isn't it?

If your deal hasn't gone through yet - don't panic!

Clubs sometimes conclude deals at the last minute and it is not always easy for them to get everything completed and sent over by 11pm. The so called 'deal sheet' allows a club to confirm that a deal has been reached in order to allow for additional time to submit the remaining documentation.

The sheet cannot be used prior to 21:00 BST and needs to arrive fully completed before the transfer window closes. Once the sheet arrives, clubs have got until 1am to submit the full paperwork.

So don't go to bed yet...

Man Utd

Image source, Reuters

Wayne Rooney, Angel Di Maria, Juan Mata, Robin van Persie, Adnan Januzaj - Radamel Falcao?How will Manchester United get them all in one team? Too many big names?

Well that's what they said when Mel Gibson, Harrison Ford and Wesley Snipes signed up for Expendables III. If Sly Stallone can make it work, LvG can...

David Ornstein
BBC Sport

"There were some last-minute rumours that Radamel Falcao had failed his medical at Manchester United. But we are assured that Falcao has passed his medical. We're just awaiting official confirmation."

Image source, Getty Images

John Roberts:, external So I awoke to the news of Falcao signing for my club, now I'm going to bed wondering if they'll sign him in time... bizarre!

Gary Rush:, external Falcao as non-existent as the Man United defence just now...

Chris Turner:, external Coventry City have four strikers, Man City have three. Madness.

Former Manchester United defender Phil Neville
BBC Sport

"Had Tom Cleverley wanted to sign for Aston Villa he would have done so. To be fair he probably didn't want to leave Manchester United. United were never going to let him out on loan. The best thing for him now is to sit out his contract."

Man Utd

Here's a poser for you.

The Manchester United website has not (as far as I know) mentioned Radamel Falcao all day.

If this deal does not go ahead, what is their strategy? Do they acknowledge that the move is off? Or just keep quiet and pretend it never happened...?

Image source, PA

Tim Oliver:, external Manchester United have invented a new game. Instead of Where's Wally, it is Where's Falcao?

Former Liverpool midfielder Danny Murphy
BBC Sport

"Danny Welbeck to Arsenal will be the signing of the day. Any Arsenal fans worried. . . don't be. He has a point to prove to so many people but he will be so hungry to do well."

...rockin' to the dawn. We tick into Tuesday and still no sign of either of the two biggest deals of the day being completed.

Make yourself another pot of coffee, we're going to sit this one out together.

Man Utd

Image source, Getty Images

Has anyone in the Greater Manchester area seen this man? Presumed dangerous inside the penalty area, he will be accompanied by several agents and a suitcase of signing-on fee money...

Kate, London: Did Man U just pretend to be signing Radamel Falcao, just so that Arsenal couldn't get him - and would have to settle for taking Danny Welbeck off their hands instead?!? #conspiracytheory