Sporting Lisbon are a bigger and better side but I think Rangers can pull off a good result. Jelavic is cup-tied so he'll probably be a big miss, this is the Rangers line up:
McGregor, Foster, Papac, Weir, Bougherra, Whittaker, Edu, Davis, Weiss, Diouf, Lafferty.
I'm not a big fan of Ricky Foster so I think he'll need a bit of cover or Sporting will expose him, Lafferty is also a terrible 'footballer' and is another weak link. Apart from that, they actually look fairly strong. Think Rangers will win 3-1 with Edu, Weiss and Diouf scoring.