I have to say that this game will be won in midfield.
I don't know much about the Leeds midfield, but snodgrass and howson played against us last time we played did they not? and were pretty quiet as they couldn't keep up with our tempo.
In Schneiderlin and Cork we have two under 21 internationals for their respected countries. I read somewhere that Cork was marked out of the game last season, i'd be more worried about Schneiderlin, as no doubt he is the best striker of a pass outside the prem, no joke. I said it the year we went down and he was only 18/19. I think Cork will play a more advanced role linking things up and Schneiderlin/Hammond depending on who plays will pull the strings from deep.
Lallana will tear you right back a new one, as will whoever is on the other wing. You could do the same to us, as like I said i don't know what your midfield is like.
It will be an interesting game, but don't expect too many goals. I'll go 2-1 to whoever wins the midfield battle.