I believe they have a few injury concerns, their first choice RB is out as well De Sciglio or something like that his name is. They may not actually have any fit, first team full backs.
We have a slight concern over Matthews who went off against Hearts in the first half after taking a couple of knocks to his ankle but I think he should be ok.
Moyoukolo is obviously still out, Forrest is out, Ledley has a niggling injury but managed most of the game against Hearts before Mulgrew replaced him and Biton still doesn't have his work permit but is meeting the squad in Milan.
I doubt Pukki will start this game but I could see him coming on from the bench at some point. Samaras may be used on one wing and Derk on the other with Stokes through the middle. Derk is certainly being pinpointed as a big player for us in this game with his pace to counter attack. I don't think this will necessarily be the right game for Commons but you never know when he's going to step up and play a blinder! One of the 4 is not going to start (Samaras, Stokes, Derk, Commons) as I think we will be playing a bit of a 4-3-3 with the wingers being asked to get forward and back a lot more to turn us into a 4-5-1 when defending.
A lot depends on what we expect Milan to do, they very nearly lost away to Torino on Saturday night but Balotelli scored a late goal to save them and NL will be formulating a plan to counter their formation based on what he saw in that game and how we expect them to play after their other games this season.