Tenn. Code Ann. § 29-15-107: Facts to be proved

(a) Upon the trial, the plaintiff need not prove an actual entry on or possession of the premises demanded, or receipt of any profits thereof, nor any lease, entry, or ouster, except as herein provided, but it is sufficient for plaintiff to show a right to the possession of the premises at the commencement of the suit.

(b) If the action be brought by one (1) or more tenants in common, copartners, or joint owners, against their cotenants, the plaintiff shall prove actual ouster or some other act by the defendant amounting to a denial of the plaintiff's right as cotenant.