Roberto Martinez said he "couldn’t be prouder" of his Everton team after they won at Old Trafford for the first time since the opening week of the inaugural Premier League season.
Left-back Bryan Oviedo scored a late winner as Everton recorded a 1-0 triumph, their first victory away to Manchester United since 1992, and condemned their former manager David Moyes to defeat.
New manager Martinez believed it was psychologically important to take three points from one of the major clubs after going 46 away games at "the big four" -- Arsenal, Chelsea, Liverpool and United -- without victory under Moyes.
But despite a famous result, the Spaniard insisted Everton have played much better in other games this season.
He said: "It was more than a football game for us. It was trying to get [over] the mental block of many, many years. Someone told me was 20-odd years since we won at Old Trafford. It wasn’t about the three points or winning, it was about being ourselves throughout and we pushed ourselves to do that and I couldn’t be prouder in that respect.
"The performance is not by any means our best of the season, I think we have played a lot better in the campaign, but we had a real mentality in the first half when we had to dig in. We never felt inferior, we always kept doing what we are good at. We created many open chances as well, which is always hard to do and I couldn’t be prouder."
And Martinez said he hopes it will encourage his team that they can win away against other top teams.
He added: "What is true is that I have always felt this squad is capable of going anywhere in this league and playing teams eye to eye."
He praised Oviedo, who is normally the understudy to Leighton Baines, but who has scored in the last two games after the England international was ruled out with a foot injury.
He added: "Bryan has got the hardest job in football to be fighting against one of the best left backs in world football in the best moment of his career. It would be easy for any professional to drop your standards and be a little bit of a nuisance around the place.
"Bryan has been working extremely hard and waiting for his chance and what he has done in the last two games is a real example of what any footballer should behave. He has got the reward his hard work away from the pitch deserves."