Hand on heart I always thought (I know it's a bit much for me to be saying this AFTER they've fought) Dirrell was the only one in the tournament whose style would beat Arthur Abraham.
I think Ward would try to go toe-to-toe with him one time too many and get hurt/dropped/stopped, and as for Kessler we have yet to discover if he is still there mentally.
Froch I see as a win for Abraham, as we know Carl loves to engage but his low guard and lack of speed at the top level will ensure Abraham manages to hurt him enough times to slow him down, not sure about a stoppage though that guys got a sweet chin.
Im not sure how Abrhama-Green would go as I've not seen him much at all but will have more of an opinion after the Ward fight whenever it actually does happen...
But basically the only way Abraham or Froch haven't managed to stop Dirrell (by the book anyway haha) is because of his extreme elusiveness...and I honestly hope Ward beats him and knocks him out of the tournament now.