The Wildcats will miss their starting guard against Duke.
Harrow was limited during the Wildcats' season-opening 72-69 win over Maryland on Friday. Harrow hasn't practiced since the Maryland game, according to Kentucky coach John Calipari.
Harrow, a sophomore, played just 10 minutes against Maryland. He finished 0-for-4 from the field, including 0-for-2 from behind the three-point line. He picked up two assists, a block and no points during his time on the court.
Jarrod Polson will start in Harrow's place at point guard Tuesday. In 22 minutes in the season opener, Polson scored 10 points, hauled in two rebounds and had three assists.
Harrow did not play for Kentucky last season after sitting out because of transfer rules. At North Carolina State in 2010-11, Harrow averaged 9.3 points per game in 29 games.
No. 3 Kentucky tips off against No. 9 Duke at 9:30 p.m. ET on Tuesday.