The Rebels rallied from 13 points back at Vanderbilt, even taking a late lead, before forcing overtime when Marshall Henderson drilled a buzzer-beating 3-pointer from 35 feet away.
Ole Miss outscored Vanderbilt 11-1 in overtime to win 89-79.
On Saturday, the Rebels lost a 13-point lead at home but surged ahead to win 76-64 against Arkansas before a sellout crowd at Tad Smith Coliseum.
With a little more than 5 minutes to play in the first half and Ole Miss ahead 24-21, the lights went out, and the game was delayed about 25 minutes.
The Rebels are back at home Thursday night at 6 against Tennessee, a team they defeated 92-74 in Knoxville on Jan. 9 to open SEC play. The Vols defeated Mississippi State 72-57 on Saturday.
Ole Miss then travels to Auburn on Saturday for an 8 p.m., tip. The Tigers lost in double-overtime at Arkansas last Wednesday then lost 75-53 at home to Kentucky on Saturday.
Point guard Jarvis Summers had 14 points and seven assists against Arkansas and is averaging 14 points in SEC play.
Backup point guard Derrick Millinghaus was 0-for-4 from the floor and did not score against Arkansas.
WarrenNolan.com has the Ole Miss RPI at 33 after the Arkansas game.
There’s far more work to be done to reach the NCAA tournament.
Ole Miss will be favored twice this week and needs to win both games to continue building its resume.