Round-by-round coverage of Terence Crawford's demolition of Errol Spence Jr. - ESPN

LAS VEGAS — Terence Crawford dismantled Errol Spence Jr. in a tour de force performance, scoring a ninth-round TKO in the long-awaited super fight to capture the undisputed welterweight championship on Saturday at T-Mobile Arena.

Crawford floored Spence in Round 2 and twice in Round 7, a two-fisted beatdown of Spence to wrest away the IBF, WBA and WBC 147-pound titles to go along with his WBO belt.

Crawford, 35, buckled a blooded and swollen Spence in Round 9 and was unloading unanswered shots when referee Harvey Dock mercifully ended the punishment at 2 minutes, 32 seconds.

Spence protested the stoppage but appeared to lose every round besides the opening frame.

Full fight recap here...