United secured the signings of Matthijs De Ligt from Bayern Munich and Leny Yoro from Lille.
Rennes defender Faye's representative Bara has said on the Inkubator podcast, "Manchester United were interested in Faye, but he didn’t like that option.
“He wasn’t a regular at Barcelona, so what did it matter if he hadn’t had the same at United? His development wouldn’t have progressed at all.
"Barca wanted a buy-back clause in Faye’s contract with Rennais, it was the only condition that Barça accepted. The clause is €30 million (£25m/$33m). Now everything depends on Faye, on how he is going to develop."