Preseason I thought this was a tough break for Ohio State. Camp Randall is a notoriously tough venue for visitors and Ohio State is coming off of an emotionally draining high-end matchup with Penn State.
So far this season, Wisconsin has not performed up to my expectations. Half-way through the Maryland game I'd have said the same thing about Ohio State but, IMHO, the last ten quarters of Ohio State football have been at a Championship level.
If Ohio State can sustain their recent level then IMHO, this will not be close. OTOH, it is REALLY tough to actually do that, it is much easier said than done. The Penn State game was one of the biggest of the year (nationally, not just for tOSU) so it wouldn't be shocking if the Buckeyes came into this a little hungover.
I think the key to the game for Wisconsin is to start extremely well then hope to be able to hang on once Ohio State gets in gear.