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Given that his side remain undefeated in Europe, Moyes couldn't be blamed for looking upon the Champions League as a plausible route to salvation this term.
However, in the last 16, things are set to get a lot more difficult than anything Bayer Leverkusen, Shakhtar Donetsk or Real Sociedad could throw, a two-legged fixture against Olympiacos next on the agenda.
Now is the time for the Old Trafford boss to decide precisely where his priorities lie in terms of holding out hope for silverware in Europe.
One major factor that tends to affect a giant of United's status during the January period is whether or not a target will be available to feature in European competition which, obviously, a massive majority of the continent's biggest faces won't be.
That being said, Moyes can put such restrictions to one side if he chooses to concentrate his efforts one way or the other, as opposed to spreading resources across both the Champions League and Premier League.
Should the former Everton man feel that domestic matters (including the potential revival of their Capital One Cup semi-final against Sunderland) are more essential and that his current, available crop are capable of going far in their international campaign, so be it.
However, what Moyes mustn't do is realise too late that he's uncertain over where to focus his efforts most and, in hindsight, come to notice that his transfer window could have been so much more.