The Red Devils were on the lookout for defensive reinforcements following injuries to a number of key players, including the likes of Luke Shaw and Marcos Rojo.
United eventually failed to bring in any reinforcements last month as Louis van Gaal was unable to bolster his defensive options.
Wenger revealed that he blocked Debuchy’s proposed move to Old Trafford before the France international eventually ended up joining Bordeaux on loan until the end of the season.
And the Arsenal boss admitted that he was somewhat surprised that United tabled a bid for the defender last month.
Speaking at a news conference at Arsenal’s London Colney training ground on Friday morning, Wenger said: “I was surprised, yes. I can understand it but I found that logical [to block the loan].
“I hope that’s not surprising to you [blocking the move]. If Man United wants to buy a player… you loan players out to clubs who do not have the resources, but not to direct opponents.
“There was nothing shocking in that and it’s true, I stand up for that.”
Arsenal are preparing to take on Hull City in the fifth round of the FA Cup on Saturday.
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