The 1921 SIAA men's basketball tournament took place February 25–March 1, 1921, at Municipal Auditorium in Atlanta. The Kentucky Wildcats won their first Southern Intercollegiate Athletic Association title, led by head coach George Buchheit.

The Kentucky Wildcats defeated the pre-tournament favorite Georgia Bulldogs, on a free throw by Bill King. Georgia beat rival Georgia Tech in the semifinals.

Bracket

* Overtime game

Championship

All-Southern Tournament Team + Player Position Class Team Billy Anderson G Senior GeorgiaBaby Roane G Sophomore Georgia Tech Bill King FFreshman Kentucky Paul AdkinsFSenior Kentucky Bob Lavin C Junior Kentucky

See also List of Southern Conference men's basketball champions

References