In this specific play Wisconsin made a modification to the common roll & replace ball screen set in which the 4/5 set a ball screen then roll to the rim while the other big lifts to the top of the key replacing him.  This makes it tough for the defense to keep somebody in the hole to defend the roll guy.

 

In this Wisconsin ball screen set after Frank Kaminsky sets the ball screen and begins to roll, the 4 man Nigel Hayes screens in for Kaminsky who flares to the wing.  With Kaminsky’s man defending the ball screen and retreating quickly to get back to him, Hayes’ defender is in help side to pick up the rolling Kaminsky.  Hayes is able to create a deep screening angle to pin Kaminsky’s defender in freeing him up for a wide open jump shot.  This small variation was very effective as Kentucky’s bigs were more used to covering the traditional roll and replace action with Kaminsky rolling to the rim, and Hayes replacing him.