Ole Gunnar Solskjaer reacts to Roma first leg at Old Trafford

Having opened the scoring early on, United were disappointed to go in behind at half-time and Solskjaer praised the character shown by his players to respond so convincingly in the second period.

"No, you don't feel the job is done but it was a good job done," Ole told BT Sport.

"I think the character showed that they came back and didn't lose their heads.

"You could say we've got one foot [in the final], but you need two feet," he added, when speaking to MUTV.

"We're still halfway. A fantastic result to build on but you've got to be focused. I've seen stranger things. Football comes back to bite you if you take it too easily. We've just got to focus on Liverpool first and then Roma."

"We did well, but we know they've got quality. They scored two goals with two chances [in the] first half, two moments that we gave them.

"They did the same to Ajax; they didn't have loads of chances but they score. In Rome, a team will get four, five, six chances against you anyway. Very pleased with the response, the second half was very good."

Bruno Fernandes put United ahead after a wonderful move and the Portuguese midfielder went on to score another and assist two more before the game was out. Edinson Cavani also put in a two-goal and two-assist performance. United's front four caused havoc throughout, but particularly in a rampant second half.

"We know we've got creative players," Ole said. "I know we've got players who create big moments and chances. It's about getting them up there in positions.

"Paul, I think is very good in that position [on the left-wing]. You've got the foundation behind him [with Fred and McTominay]. Marcus, Edi, Bruno, Paul... against any players they will create chances, so it's about taking them. That's the difference today; we took most of our chances."

United's four-goal advantage puts us in a commanding position going into next Thursday's second leg in Italy, and the result is an historic one. Not since Real Madrid put six goals past Zurich in 1964 has a team netted so many in a European semi-final. It's only the 11th time that the club have scored six in any European competition, having played 393 games in continental tournaments.

Ole was also asked about what he said at half-time, with the Reds trailing 2-1 following a disappointing first 45 minutes.

"We know that we are capable of scoring goals, as long as we didn't concede more goals, we needed two more goals to go through over three 45-minute spells, but now, I couldn't imagine how well we played second half," said the boss.

"That was exhilarating [and] absolutely how we want to look. That's how we want to look like: full-backs going forward, front four combining, centre-backs playing out from the back, two midfielders patrolling there... absolutely excellent performance."