When the dust settled on the summer transfer window at the start of the month, Louis van Gaal had made further modifications to his squad for 2015/16.
After the earlier arrivals of Memphis, Matteo Darmian, Bastian Schweinsteiger, Morgan Schneiderlin and Sergio Romero, the Reds had one more trump card reserved for the last day of the transfer period.
Anthony Martial, an exciting and young- if relatively unknown- French forward arrived from Monaco to swell Van Gaal's attacking options.
The transfer caught fans and pundits on the hop- with Martial's name seldom- if ever- linked to United in the press speculation in the preceding days and weeks- but LVG revealed that United had been monitoring him for some time.
"Anthony is a naturally talented, young, multi-functional forward with great potential" stated the manager after the deal was confirmed.
"We have been watching him for a while now and he has developed immensely during his time at AS Monaco.
"I am delighted he has joined Manchester United as I believe this is the right club for him to continue his development as a young player.
"He has all the attributes to become a top player, however we need to give him to adjust to his new environment and the rhythm of the Premier League."
There was significant traffic heading out of Old Trafford in the closing stages of the window, too, with some popular and successful figures calling time on their United careers.
Jonny Evans moved to West Bromwich Albion, where he will link up with former team-mate Darren Fletcher, eight seasons on from his first-team United debut.
Javier Hernandez also left the club permanently, signing for Bundesliga side Bayer Leverkusen five years after joining the Reds.
Anders Lindegaard became another former Red at WBA when he also swapped Old Trafford for The Hawthorns where he will challenge another ex-United gloveman Ben Foster between the sticks.
There were also some eye-catching loan moves, most notably Adnan Januzaj linking up with Borussia Dortmund for the coming season.
The young Belgian can now look forward to developing in the Bundesliga and also playing in front of huge crowds at the Westfalenstadion.
Everyone at United welcomes Martial and wishes all the best to those leaving Old Trafford.