Nemanja Matic believes victory against bitter rivals Liverpool is a timely boost ahead of Manchester United's biggest game of the season against Sevilla.
The Champions League last-16 clash is evenly poised ahead of Tuesday's return leg after David De Gea inspired Jose Mourinho's men to a goalless draw in Spain.
United have won three straight matches since the first-leg draw, with morale-boosting successes against Chelsea and Crystal Palace complemented by Saturday's 2-1 triumph over Liverpool.
Marcus Rashford's first-half brace proved the difference as United increased their stranglehold on second spot in the Premier League and got a key week off to a flying start, with the FA Cup quarter-final against Brighton following Sevilla's visit.
"Very important," defensive midfielder Matic said of the Liverpool win. "Very important for our confidence to win this sort of game. We won against Chelsea and of course (on Saturday), so confidence will be on a high level, for sure.
"We have to see what we did well to continue like this. We have to know where we made mistakes to improve.
"The next game is very important for us, maybe the most important game of the season. We have to beat Sevilla to go through, so we give our best."
Matic hopes to make the United fans proud again on Tuesday after a ruthless first-half display at Old Trafford, where things would have been far less nervy had Juan Mata managed to make it 3-0 with an acrobatic attempt.
"We managed to score two very quick goals thanks to Marcus Rashford," the Serbia midfielder said. "It was a great first half, especially.
"After that, we tried to defend our advantage, which we managed to do. We had also the in the first half (a chance) to finish the game and make it 3-0 but we didn't use our chance.
"They didn't use some chances also but, in the end, the most important thing is three points."