Saint Louis (3-0) got the game-winner with a minute left in the contest, taking advantage of a defensive breakdown by UNC (3-1) and beating Tar Heel goalkeeper Michael Ueltschey in a one-on-one battle to the right of the net.
Junior Matt Crawford scored UNC's lone goal of the match off an assist by freshman Marcus Storey. The Tar Heels outshot the Billikens 8-7 on the day.
With the win, the Billikens improved to 3-0 against Carolina all time, including earlier wins in 1991 and 1994.
On Friday, sophomore midfielder Sean McGinty tallied the game-winning goal in the 47th minute to lead UNC past Cincinnati.
Storey scored UNC's first goal and was credited with the assist on McGinty's score.
Volleyball Goes 1-2 in California
SANTA CLARA, Calif. -- The North Carolina volleyball team lost a five-game match to Santa Clara in the final match of the Santa Clara Invitational Sunday afternoon. On Saturday, the Tar Heels (4-3) lost to No. 13 UC-Santa Barbara before beating Creighton later in the day.
Santa Clara topped UNC 30-24,
27-30, 22-30, 30-24, 15-6. Outside hitter Laura Greene had a double-double for the Tar Heels, recording 16 kills and 13 digs. Outside hitter Nicole Reis led UNC in kills with 19.