On loan Paul McShane is suspended for two matches with Brighton.
The FA Cup Final will be staged at Cardiff after Multiplex finally accepted that Wembley will not be ready in time.
Diego Forlan returns to Glasgow with Villareal and remembers that cracking volley two years ago against Rangers: "It was not a lucky goal it was what I meant to do, I meant to put it there," he said.
"Hopefully I can score again. An away goal would be very good for us, we know Rangers will be trying to win the game so it will be hard for us. We will need to defend as best we can.
"I played against Rangers two seasons ago. They have changed a lot of their players since then but I know some of their players and we will watch videos of them over the next couple of days."