Rooney has now called on United to take their European form into the Premier League.
He said: "The most important thing was to get back to winning ways and top the group so we've done that.
"It could have been better at times but thankfully we got the win.
"(It was) win at all costs - after the last two games we knew it was vital.
"We got a good result and if you'd have said beforehand that we'd win the game after the last two results, we'd have certainly taken that.
"The campaign has been good this year in Europe so we just have to try and get that consistency in all our games, whether it is Europe or the Premier League.
"Hopefully we can do that in the upcoming games and get back in a good position."
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