ST. LOUIS (AP) Micah Mason had 22 points, Jerry Jones added 19 and Duquesne surprised No. 10 Saint Louis 71-64 on Thursday night to snap the Billikens' school-record, 19-game winning streak.
Saint Louis (25-3, 12-1 Atlantic 10) had not lost since dropping a 70-65 decision on Dec. 1 to unbeaten Wichita State, now ranked No. 2 in the country.
Mason, who entered leading the nation in 3-point shooting percentage (.554), hit four of five from behind the arc for Duquesne (12-15, 4-10), which beat a top-10 opponent on the road for the fifth time (5-28). The Dukes, who were 14-point underdogs, improved to 25-55 against teams ranked in the top 10.
Dwayne Evans had 10 points and 12 rebounds for Saint Louis. Mike McCall Jr. led the Billikens with 18 points, while Jordair Jett (13 points) and Rob Loe (12 points) also were in double digits.
Saint Louis, which could have clinched at least a tie for the Atlantic 10 regular-season title, will try to rebound Saturday when it visits VCU.
The Billikens appeared to be in good shape after Jett's layup with 13:44 remaining gave them a 42-35 lead. But the Dukes took command with an 18-2 run capped by a 3-pointer and then a layup by Jones that made it 53-44 with 7:41 left.
Saint Louis fought back and had a chance to cut it to a one-possession game with under a minute remaining. Loe, however, missed a free throw and that led to Jones' layup at the other end with 52 seconds left that made it 63-57.
The Dukes played Saint Louis tough in their first meeting, losing 76-72 at home on Jan. 22. Duquesne was up for the challenge again Thursday and showed it early as Mason hit his first two from behind the arc to help the Dukes grab a 13-8 advantage.
Mason was called for his second foul shortly thereafter and went to the bench, and the Billikens began to take advantage of his absence. Saint Louis went 1 for 7 from 3-point range in the first half, but Jake Barnett's 3 with 44 seconds left gave the Billikens a 29-25 halftime lead.