United won 1-0 thanks to Marcus Rashford's 93rd minute winner.
De Gea reflected on MUFC: “It was a very good (late winner), especially because we play against a good team, a team that we were very close to in the table.
“It was a massive goal, a massive win for us.
“The fans, they have been amazing the whole game. We keep trying, we control the game, I think, from the beginning.
“But we believe, we trust in ourselves, we fight until the end and we scored a beautiful goal.
“(The fans) keep pushing the team, they keep shouting and that gives us a bit more energy at the end of the game because when people were tired.
“But what can I say? It was an amazing feeling to celebrate the goal and the fans shouting. It was unbelievable.
“Hopefully this game gives us more confidence, more trust in ourselves. And from today, let's see if we can win more games in a row and to be more controlling games and keeping more clean sheets.
“I think to keep a clean sheet was massive for us. We didn't concede many chances today. We controlled the game very well but then they defend very well as well, so it was not easy to create chances.
“But we push, we push until the end and we score, like I said, an amazing goal."
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