I don't know about "in the bag." Butlet has been some quality competition in this tournament, they'll have the confidence to go against Duke. It comes down to whether or not Duke's "big 3" can be as effective as they were against the Mountaineers and also if Zoubek can stay out of foul trouble. Duke can outsize Butler, certainly, but the Plumlees are not as good on the offensive glass as Zoubek. It's a tradeoff, with the Plumlees, you can perhaps get more offense out of the low post. But with Zoubek, you'll get more offensive opportunities overall. Which, again, brings the big 3 back into the picture: can they put two great games together in a row?
22 hours from now, we'll see.