Manchester United manager David Moyes had yet another week to forget as he watched his side beaten 2-0 in Greece by Olympiacos on Tuesday night. 

So, what did we learn? Let's take a look: 

1) Manchester United struggle without prize asset Juan Mata

It's always a bummer when a player is cup-tied,  and that's exactly what Juan Mata is after he played for Chelsea earlier in the Champions League. Realistically, United needed him on Tuesday night.

Yet again there was no penetration throughout the squad, they looked disjointed and like they were a team of strangers put together for the first time. United needed a player to make those defence splitting passes and take charge when the team attacked.

Kagawa was subbed on to fill the void, which I think he did very well, but Wayne Rooney and Robin Van Persie both missed the vital pass which indefinitely would have come from Mata.  

2) Robin Van Persie needs to take some blame, as well as his team-mates

It came as a massive surprise to all when Robin Van Persie said what he did about Moyes' tactics and how he is struggling under the new taskmaster. Is he right? I cannot deny that the tactics of David Moyes are wrong.

But when you look at the facts and figures a bit closer, it seems that Van Persie isn't exactly a glowing figure on the pitch at the moment either. His haring miss late on in Greece capped off a rubbish night for Moyes' side and really there were no stand-out performers.

They are a team, and need to start acting like one. The team share equal blame. 

3) One step forward, two steps back is the pattern

After a win against Crystal Palace at the weekend it was thought that United's form was on the up, but on Tuesday it all came to an end once again.

This isn't the first time Manchester United have fallen, throughout the season they have impressed in one game before the next they've thoroughly disappointed. It's one step forward, with fans thinking that Moyes finally has it right although it seems in their next game they let themselves down being worse than they were before. 

4) United need a pick-up, confidence is on the floor

Before now, the insecurities at Manchester United have been masked for various reasons, but on Tuesday in such a massive stadium along with such a tense atmosphere there was no place to hide.

United looked scared to tell the honest truth, there was none of the Manchester United of old where if they were hit they'd hit back twice as hard. The mighty Red Devils looked threatened by Olympiacos and fighting spirit, along with the confidence to beat a man was nowhere to be seen.

Perhaps it's because of form? But something needs to change for the Red Devils.

5) Change the tactics Moyes, they just don't work!

It was quite clear that David Moyes has set his side out to make long passes and hopefully get in behind the Greeks, but this didn't work. United gave the ball away a lot from long passes.

Even the passes they did manage weren't worthwhile, with the majority either cross-field or backwards. It was stout defending from Olympiakos, but you'd think United would get through them at least a few times. The play was dictated by the home side and they could easily let United use their tactic as it was clear nothing was going to come of it.

If top four is to be realistic, then they need to thoroughly change their tactics.

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