Her status for Thursday's game at Kentucky remains questionable, and she is listed as day to day.
Jenny Moshak, assistant athletics director for sports medicine, will treat the injury aggressively.
Coach Pat Summitt said during her Wednesday media teleconference that center Tye'sha Fluker was likely to be able to play Thursday. She had also been listed as questionable because of pain and swelling in her left knee.
Fluker underwent a bicycle workout during practice Tuesday and felt better afterwards.
"She feels that Tye will be good to go," Summitt said of her conversation with Moshak today. "She was optimistic."
Hornbuckle's injury is serious and could keep her out of the lineup or limit her effectiveness.
"I do think that is more in question," Summitt said of Hornbuckle's status. "If Jenny wasn't our trainer I'd really be concerned. There is a possibility she can play."
Tennessee leaves today for Lexington. Summitt said Wednesday that she had not decided on her starters yet against Kentucky, but she would be making a change.
If Fluker is unable to go, Summitt said sophomore Sybil Dosty has earned the right to play more minutes, and she also would consider starting her.