Fabio Coentrao
Coentrao was left bitterly disappointed when his move to United collapsed. (Reuters)

Real Madrid full back Fabio Coentrao had to be consoled by Cristiano Ronaldo and Luis Nani after he was reduced to tears when he discovered his proposed loan move to Manchester United had fallen through.

The Premier League champions launched an effort to take the Portugal international on a season long loan late into a chaotic transfer deadline day on Monday, only for Real Madrid to pull the plug on the deal when Guillerme Siqueira - who the Spanish club had lined up to replace Coentrao - chose a move to Benfica over the La Liga giants.

A number of outlets reported Coentrao's move to Old Trafford as a done deal late on Monday night with the paperwork for the agreement thought to have been submitted to the relevant parties, but it wasn't until Tuesday afternoon when the deal was officially ruled out.

The 25-year-old, currently with his Portugal teammates ahead of a World Cup qualifier against Northern Ireland on Friday, is understood to have been crushed when he learned his proposed move to Old Trafford was off, according to Portuguese publication Record.

The former Benfica star spoke of his desire to seek a fresh start away from the Bernabeu this summer having found his first team opportunities limited in recent seasons, and was reportedly extremely keen to complete the move to Manchester.

BBC Sport understand that the move was tantalisingly close when the initial paperwork was submitted before Monday's 11pm deadline; documents containing the terms of the loan deal complete with signatures from both clubs and Coentrao himself.

But Real's refusal to sanction the deal at its final stages left the 25-year-old extremely disappointed.

The Premier League champions turned their attention to the Real Madrid man after failing in their persistent attempts to bring Leighton Baines to Old Trafford.

It would transpire that their efforts to sign Coentrao would be another lost cause in a summer littered with failed endeavours, a dubious list that already includes the names of Baines, Cesc Fabgreas, Sami Khedira and possibly Wesley Sneijder and Daniele de Rossi, if reports are to be believed.