The sensational Englishman swooped to send his side into the last four of the competition and he is delighted to after the match.
The English international believes that his side did it in a hard way after they put their steps into the Europa league semi-finals by deleting the Anderlecht.
The Armenian international scored the opening goal for the Red Devils side as he did this in the first leg also for them but the from the visitor's side Sofiane Hanni scored the equalizing goal and the match extended to extra time,
But in the 107th minute, the charismatic Rashford scored the winning goal for his side and sealed the match for the Manchester United side.
After the two legs, the Manchester United side reached to the Semis on 3-2 aggregate.
In an interview, Rashford said: "All you can do is keep trying to create chances and that is what we kept doing,"
"We pinned them back in the second half and started pushing as a team, which is what the game needed at that time.
"We had a lot of chances and could have scored a lot of goals but sometimes games go like that. We got one in the end and everyone is happy now.
"You just have to keep going and hope you get another chance. We have done it the hard way but none of that matters now."
The veteran midfielder Michael Carrick expected the worst when in the second half Manchester United unable to turn their chances into goals.
After the match, Carrick said: "We created a few chances and didn't take them again - we thought it might be one of those nights,"
"We did not start well because we did not capitalize on the goal. But we are through - that is what you have to do in cup competitions.
"People are saying, 'Are you going to prioritize the league or the cup?' We have got to fire on all fronts. We have got a duty to do that. We have still got a chance in both competitions.
"Cup nights like this when you go through are great. There is the great belief in the squad, a great atmosphere and we hope to carry it on.
"It is disappointing [to have Rojo and Ibrahimovic injured]. We have played a lot of games. Hopefully, it is not too serious because they are two big players for us."