Anita had tasted victory at Old Trafford with Ajax in the Europa League.
He said after Saturday's shock win: "We knew that it had been 41 years since we last won here.
"We were told it a few days ago by the manager. It's a historical win and we did it with good, beautiful football.
"We pressed the ball and kept it well when we won it back. We needed a win, of course.
"We lost on Wednesday at Swansea so felt we had something to straighten out, and we did it well."
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