Back in the summer, Manchester United duo Ole Gunnar Solskjaer and Ed Woodward met to discuss transfer business at Old Trafford. After a summer where they'd again fallen well short of eventual Premier League champions Manchester City, the duo knew they needed to recruit.
One of the areas both men agreed needing bolstering was at right-back.
Having seen Kyle Walker and Trent Alexander-Arnold flourish for Manchester City and Liverpool respectively, United knew they needed someone they can depend on.
As per usual, many names were linked once it became public knowledge that the Red Devils would be signing a replacement for veteran Antonio Valencia.
Thomas Meunier had his admirers at Old Trafford but Solskjaer knew who he wanted. In his eyes, it was this player or nothing at all.
So after much pressure, Woodward finally agreed to meet Crystal Palace's asking price for defender Aaron Wan-Bissaka.
Man Utd boss Ole Gunnar Solskjaer pressured Ed Woodward on Aaron Wan-Bissaka
And, certainly based on Saturday night's stirring 2-1 victory over Manchester City at the Etihad, it appears to be money well spent.
City went into the game as favourites. While they've suffered a blip of late, they're still the defending champions. Still the possessors of the best set of players in the world right now.
United had beaten Tottenham but, before that, failed to beat Sheffield United, Astana and Aston Villa.
But the Red Devils sprang a major surprise, with goals from Marcus Rashford and Anthony Martial giving them three precious Premier League points.
And Wan-Bissaka, amid the heat of the Etihad battle, delivered perhaps his finest display in a red shirt yet.
The United star was solid to the point where City players, on more than one occasion, would look to the heavens in frustration.
Raheem Sterling, the same Sterling whose name was banded about for the Ballon d'Or, had one of the quietest displays of his City career.
That's some feat. This wasn't Wan-Bissaka against a tricky winger. This was him against the trickiest winger, perhaps in the entire world.
And the 22-year-old didn't give him an inch. Not one.
It was similar with Angelino. The City star would try everything to get past his United counterpart - only to find a big red wall in front of him.
In the end, Wan-Bissaka finished the game with a 100 per cent tackle success rate. For a derby, that's a stunning accomplishment.
And it proved that Solskjaer was right to pressure Woodward. He wanted United to sign the defender, he got his man, and now the only way seems to be up.
Wan-Bissaka's display wasn't entirely perfect. It was he, after all, who was outjumped by Nicolas Otamendi for City's goal.
But Solskjaer certainly got the right man and, if United didn't have Wan-Bissaka, they wouldn't be sitting in the lofty heights of fifth in the Premier League table.