The Swede got his second goal in as many games with an excellent finish in the first half.
The win keeps the distance between them and fourth placed Manchester City at four points.
And Ibrahimovic is determined to do whatever it takes to reach the top four.
Manchester United player ratings against Sunderland
Sun, April 9, 2017
Express Sport rates how the Manchester United players performed during their Premier League clash with Sunderland
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Which Manchester United players impressed during their clash with Sunderland?
Manchester United striker Zlatan Ibrahimovic
He said: "Today was a good win and we have to keep focus and keep working and keep believing we can reach the top four. We believe in it and we will do everything we can to reach the top four.
"At the end the best team will win so the game was good and we got the 1-0 and the red card.
"I couldn't see if it was a red card or not but he gave it and then we played with one more. Sometimes it's more difficult but sometimes it gives you the advantage because you have one more."
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