Arizona guard Kevin Parrom tumbles to the ground trying to block a shot by Memphis forward Wesley Witherspoon in the first half of a West Regional NCAA tournament second round college basketball game, Friday, March 18, 2011 in Tulsa, Okla.

Tulsa, Okla. ? Derrick Williams had 22 points and 10 rebounds, and blocked a potential tying shot in the final seconds to seal Arizona’s 77-75 win over Memphis in the second round of the NCAA tournament on Friday.

Joe Jackson hit the first of two free throws with 5 seconds left, then missed the second to give the 12th-seeded Tigers a shot at the tie. Wesley Witherspoon grabbed the offensive rebound at the left block, but Williams came over to swat it away and send the Wildcats into a Sunday game against fourth-seeded Texas.

Lamont “MoMo” Jones added 18 points for Arizona (28-7), including the go-ahead 3-pointer with 1:35 to play. He added two free throws with 7.4 seconds left to make it a three-point game.

Antonio Barton led Memphis (25-10) with 17 points, and his brother Will Barton scored 12.