Harrison hurt her right knee Thursday in an 82-72 victory over Texas A&M and sat out Tennessee's 78-65 loss at Kentucky on Sunday. Harrison already missed six games this season with an injured left knee, which caused her to undergo surgery on Feb. 1.
The 6-foot-3 sophomore averages 9.5 points, 7.8 rebounds and 2.8 blocks per game for the ninth-ranked Lady Vols.
In other Tennessee injury news, senior guard Kamiko Williams participated in Wednesday's practice after spraining both her ankles Sunday.
The top-seeded Lady Vols (23-6) play a Friday quarterfinal against the winner of Thursday's game between Arkansas (18-11) and Florida (17-13) at Duluth, Ga.