Tennessee (12-6, 1-5 Southeastern Conference) last dropped five straight games in 1970. Four of the losses have been decided by a total of nine points.
Tennessee had taken a 79-78 lead with 10.2 seconds left on two free throws from Evina Westbrook, who led the Lady Vols with 24 points. Monk responded by racing down the floor and scoring for Arkansas (14-5, 3-2).
Westbrook missed a 3-point attempt at the buzzer.
Chelsea Dungee scored 19 points and Alexis Tolefree had 16 for Arkansas. Zaay Green had 17 for Tennessee, and Cheridene Green had 15 points and 12 rebounds.
Tennessee guard Meme Jackson was helped to the locker room after getting hurt driving to the basket in the third quarter. After the game, Lady Vols coach Holly Warlick called it an ankle injury and described Jackson’s status as day to day.
The Lady Vols, who fell out of the Associated Press Top 25 earlier in the day, host No. 1 Notre Dame on Thursday.