Only official injuries we have are Lichtsteiner & Howedes, the former isn't even included in CL squad. Mandzukic is a doubt, hopefully he'll be able to make it back.
Anything other than a win here will be a failure and a huge disappointment. No room for error. We can't put our fate in the hands of others team and hope that Sporting won't cause an upset.
It's worth noting that this game comes 3 days after Olympiacos' league fixture, which they won 3-1, and 4 days after their next. They are leading their league's table with a point to spare, . However, AEK Athens still have a game to play and could jump them by a point to take the lead.
If I were a betting man I'd put my money on Olympiacos focusing on their league. That being said, we can't go into this one depending on anyone else but us.