A pleading may state as a counterclaim any claim against an opposing party, whether or not arising out of the transaction or occurrence that is the subject matter of the opposing party's claim.
Tenn. R. Civ. P. 13.02
A pleading may state as a counterclaim any claim against an opposing party, whether or not arising out of the transaction or occurrence that is the subject matter of the opposing party's claim.
Tenn. R. Civ. P. 13.02