Undertakers rivalry

The Undertakers rivalry began at Wrestle Mania 25 with Shaun Michael's. They both wrestled each other that night. Undertaker won but Shaun Micheal's still put up a good fight. Back and forth the match went but eventually one had to win and that was the Undertaker. The rivalry ended at Wrestle mania 26 when Undertaker beat him and ended his career forever.