I don't subscribe to the theory Liverpool will blow Villarreal away at all, I think they will be too much for them over two legs, but it'll be a battle.
If they are to drop points it will be in between or immediately after that tie for me, same for Chelsea FA Cup Final.
It could be a really tough tie, or Villarreal could conced early and it'll be a piece of piss.
They are a sit back and counter side, and they can be very dangerous on the counter but all it takes is a simple mistake or a bit of luck and they go down easily and the game is over.
IIRC They've won 1 league game after going behind in 2 years. Most of their losses involve conceding in the first 30 and never getting back into it.
If they can hold out the first half, teams tend to get frustrated, but Liverpool could just as easily come flying out of the blocks and have the game won 20 minutes in.