“Norwich deserved their win because they worked so hard for it, although we had a lot of possession and one or two half chances. We didn’t create enough great chances. It just wasn’t our night,” Ferguson said on ESPN.
“Their goal was a marvellous cross and a great touch for the header. There was nothing our keeper could do about that.
“So you have to give credit to Norwich because they battled well, and their goalkeeper had a good night as well, so it is disappointing.”
United had trailed 2-0 at Aston Villa last weekend, but recovered to record a battling victory.
However, the fightback never materialised, even after the introduction of second-half substitutes Paul Scholes and Danny Welbeck.
“You always feel that we can do that [come from behind to win] because the history of the club is like that – players have gotten used to making comebacks and we are always a threat in the last few minutes of matches.
“We were tonight in some respects, but they defended really well and the goalkeeper made some saves at vital moments.”
Leading scorer Robin van Persie had recovered from the thigh strain which kept him out of Holland’s midweek friendly with Germany, while Javier Hernandez also started after his match-winning cameo at Aston Villa last weekend but failed to make an impact.
“You always miss your good players, but we had plenty of good players on the pitch tonight.”