ATLANTA (Ticker) -- Xavier guard Romain Sato was cool down the stretch. Texas coach Rick Barnes was not.
Sato scored 27 points and made 6-of-8 free throws in the final 25 seconds as the seventh-seeded Musketeers held off the third-seeded Longhorns in an Atlanta Region semifinal, 79-71, to advance to the Elite Eight for the first time.
Lionel Chalmers added 14 points, seven rebounds and six assists for the Musketeers (26-10), who have won 16 of their last 17 games and await Duke in Sunday's regional final.
"No one knew we could get to this point, and to get to this point means more to us than a team like Duke or a team that was supposed to get there," Chalmers said. "It means more to us as players and coaches. It means a whole lot to see how good we are and for everyone to get a chance to see how good we can be."
Barnes was ejected after being assessed two technical fouls with 3.9 seconds left, likely after a loose-ball foul was not called on Xavier's Dedrick Finn while grabbing a rebound off a missed 3-pointer by Sydmill Harris that would have tied the game.
"Throughout the game, I was trying to converse with the officials unsuccessfully," Barnes said. "Playing a perimeter team like Xavier, a team that lives on setting screens, I wanted the fouls to be called on the outside as well as the inside. If it is called a foul on the inside, it should be called on the outside. Not just tonight but any game.
"They officials refused to discuss it with me until the end of the game. They shot 23 free throws to our four in the second half. Calls have to be made both inside and outside."
Sato then made 3-of-4 technical free throws and Finn, who was fouled snatching the rebound, sank both attempts to cap the scoring.
"We said just play hard, take it one game at a time, and when we got to the A-10 (Atlantic 10 tournament), we started playing together," said Sato, whose team handed St. Joseph's its first loss en route to winning the conference tournament. "When our chemistry came together, we started winning games."
Brandon Mouton scored 21 points before fouling out with 2:09 remaining for Texas (25-8), which reached the Final Four last season.
"It was in the flow of the game," Mouton said. "It was a tough call at that point in the game. I was playing my heart out and it hurt because I could not help my team win the game."
The Longhorns held a 30-22 lead before Xavier got back in the game on a 10-0 run late in the first half. The Musketeers held a 63-53 lead after a layup by Anthony Myles with 9:40 remaining before the Longhorns pulled within 72-71 on a 3-pointer by Brian Boddicker with 16.8 seconds left.
Sato calmly sank two free throws less than a second later, Harris missed his off-balance 3-pointer and the Musketeers held on.
"From seven minutes on, I felt we were in scramble mode defensively," Xavier coach Thad Matta said. "They have so many great players and we were uncertain of who and how to guard guys. I said we have to play with intelligence and use our heads and come up with rebounds. I thought that was the tough part, but fortunately, we made it through."
Xavier shot just under 40 percent (23-of-58) but connected on 25-of-35 free throws while Texas went just 12-of-17 from the line. Sato made 14-of-17 free throws.
The last time the Musketeers reached the "Sweet 16," in 1990, they suffered a 102-89 loss to Texas.