The Englishman netted a goal which bore a striking resemblance to a winner scored at Craven Cottage by former team-mate Cristiano Ronaldo in 2007.
United went on to win the title that season, and Rooney is now hoping that the similarities between the situations proves a good omen.
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"We had a lot of chances, in the first half in particular. Sometimes you wonder if it’s going to be your day, but we kept going and thankfully got the goal and the three points.
"Rafael clearing off the line [from Ruiz] was a key moment. We had chances too but had to dig in and battle, and we did that to get a massive three points."
Manchester United captain Patrice Evra was also complimentary of his team-mates' spirit following the win in west London.
The French defender added: "We have a winning mentality. This is the Manchester United spirit. That is the strength of the boss. It is what he instils in us every year. That is why we want to win every game. It doesn’t matter who we are playing."