Durand Johnson scored 18 points with four 3-pointers to lead St. John's (7-10, 0-4), which has lost seven straight including its first four Big East contests. Ron Mvouika had 13 points and five assists.
Mvouika made a 3-pointer to tie it a 63-all with 4:44 left. Ellenson answered with a jumper to spark a 10-2 run and Marquette led 73-65 with a minute to play. Fischer scored four points with a block, Ellenson had two defensive rebounds, and the Red Storm missed seven shots during the stretch.