The Spanish goalkeeper was one of United's star performers in Sunday's thumping 8-2 victory over Arsenal - making a vital penalty save from Robin van Persie followed by several other great stops, having kept a clean sheet in a solid home debut against Spurs the week before.
And the summer signing from Atletico Madrid says United’s passionate home support have already left an indelible impression on him.
“Old Trafford is wonderful, very big, and the best thing is when it is packed and the crowd is cheering,” the 20-year-old told United’s official Spanish website.
“Our fans are truly unbelievable. They sing the whole time and cheer for the team, and for us that is very important.
“My debut was an unforgettable moment and I enjoyed everything about it – the atmosphere, the stadium and the game, as well as keeping a clean sheet, which is important for the team.
“And I’m very happy that we made it two wins from two against Arsenal. Now we’re aiming to continue along the same lines.”