The only way I could have scripted that draw better would have been to swap Villareal with Arsenal. United face Porto in the QFs, and (if they get through) either Arsenal or Villareal in the SFs. Looking at the other ties, I don't think any team could ask for a better shot at defending the Champions League than United have got this time round.
Fingers crossed for a Liverpool vs. United final - should have happened last year but bring it on this year instead then!
