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If Manchester United can claim victory over the two-leg tie with Real Madrid, a lot of people will be proven wrong, while fans of the club will feel a sense of vindication.
The standard of the current Premier League has been slated by a good number of people across the continent, but if the runners up of Britain's top league can beat the reigning Spanish champions, such voices will be hushed.
After dodgy performances against the likes of Tottenham and Norwich this season, many declared the club in a state of crisis. But now, the Red Devils seem to be peaking at exactly the right time, as they often do.
If Robin van Persie plays a major role in a win, much of the post-match reaction will be centred on him, some of it criticism aimed once again at Arsenal for selling a true difference-maker to one of their rivals.
But in truth, United are far from being a one-man club. Perhaps a convincing victory in the Champions League will awaken people to this fact.
The legend of Sir Alex will build, while the budding careers of youngsters like Phil Jones and Rafael would jump forward a notch thanks to the experience.
In the long term, a high profile win would also make Old Trafford more of a desirable destination for potential transfer targets.
The aura surrounding the club that has dimmed a little since Ronaldo's departure would make a glowing comeback.