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The Pac-10 Player of the Year has done everything expected of him in Arizona's first three games of the tournament and then some.
He had the game-saving block in the final seconds against Memphis in the second round, and then he scored the go-ahead points and got the game-saving block, again in the final seconds, against Texas.
He carried his Wildcats in their Sweet 16 matchup against Duke to keep his team in it in the first half and then continued to dominate the paint in the second as his teammates chipped in, and they cantered into the Elite Eight at the expense of the defending champs.
He's been unstoppable through three games, and No. 3 UConn will have to find some way to stop him Saturday.
The best way to do that is to cut him off at his source: his teammates.
UConn has plenty of scoring threats of its own, especially from deep, so they can certainly match Williams for points.
If they can keep the rest of the Wildcats off the scoreboard, thereby diminishing Williams' chances as well, they may not need to worry too much about Williams scoring.
He's a big guy and is hard to stop when he gets around the basket, but he's not who the Huskies need to worry about. They know they can rack up points thanks to Kemba Walker and Jeremy Lamb, but they'll need to be wary of giving up too many open jump shots thanks to double-teaming Williams and giving up offensive rebounds and easy buckets.