Jordan Gathers knocked down a 3-pointer at the buzzer to lift St. Bonaventure to a 71-68 upset of No. 18 St. Louis on Friday, knocking the top-seeded Billikens out of the Atlantic 10 Tournament. Gathers' shot was the third 3-pointer made in the last 39 seconds of the game and set up a meeting with Saint Joseph's in Saturday's semifinals. The Hawks beat Dayton later Friday. Dwayne Evans had just tied the score for St. Louis on a 3-pointer at the other end but couldn't get out quick enough on Gathers, who broke free up top to get into position for Charlon Kloof's pass. Matthew Wright scored 22 points for St. Bonaventure (18-14) and made three key 3- pointers in the second half, including one from the right corner for a 68-65 lead with 38.2 seconds left. Earlier, he made back-to-back threes -- the first to give St. Bonaventure its first lead, and the second to make it a 57-52 game with nine minutes left, capping a 10-0 run Kloof also scored 22 for the ninth-seeded Bonnies, who opened the tournament with an 82-72 win over La Salle on Thursday to stop a four-game losing streak. Youssou Ndoye added 13 points in the win. Mike McCall Jr. led Saint Louis (26-6) with 21 points, Evans scored 15 and Jordair Jett had nine.