WASHINGTON -- Jalen Johnson scored 18 points and No. 6 seed Saint Louis roared back from an 11-point halftime deficit to down 10th-seeded George Washington 70-63 in the second round of the Atlantic 10 Conference Tournament on Thursday night.

Saint Louis advances to face No. 3 seed Davidson in a semifinal game Friday.

A night after downing Fordham to advance, the Colonials scored 10 points off of turnovers by the Billikens and used 16 second-chance baskets to take a 32-21 advantage at the break.

Saint Louis took the lead midway through the second half, but George Washington tied the game at 52 on a Jair Bolden 3-pointer with 7:17 left. Davell Roby answered with two free throws, a layup and a jumper and Javon Bess hit a 3 to end the threat.

Bess finished with 16 points and eight rebounds and Roby contributed 15 points for the Billikens (17-15), who shot just 25 percent in the first half, but roared back to shoot 66.7 percent in the second.

Bolden finished with 16 points to lead George Washington (15-18). Terry Nolan Jr. and Bo Zeigler each added 13 points.