United won 2-0, but both Zlatan Ibrahimovic and Adriano hit the woodwork for the visitors.
“It was the type of match where we had to play a different type of football,” Ferguson told Sky Sports.
“Inter showed fantastic experience at times and showed that South American mentality and were very difficult to break down.
“The end result was very good. Good result, not a great performance.”
“When I first heard the draw I thought it was the hardest,” he added.
“You’re playing a magnificently experienced Inter Milan team, who are seven points clear in their league, and you know you never get an easy game against the Italians and that proved again tonight.”
