LAS VEGAS—After three fights featuring nine combined knockdowns and a wealth of unforgettable moments, Tyson Fury finally ended his epic heavyweight rivalry with Deontay Wilder with one last valedictory punch. Fury got up from the canvas twice in the fourth round and eventually stopped Wilder with a devastating right hand in the 11th round, retaining his WBC title Saturday night in the thrilling conclusion to a superlative boxing trilogy. Fury (31–0–1, 22 KOs) finished Wilder for the second straight time in their three bouts, but only after a back-and-forth event featuring five combined knockdowns and several apparent moments of imminent defeat for both men. Wilder ultimately ended up facedown on the canvas at 1:10 of the 11th round after a chopping right hook fired from high in the air by the 6-foot-9 Fury. “It was a great fight,” said Fury, the sport’s lineal heavyweight champion and a former unified world …