#5 The Undertaker vs. Brock Lesnar (WrestleMania 30, 2014)
It seems strange now, but Brock Lesnar's first two years in his second stint at WWE weren't that notable. Off of a hot return in 2012, he lost to John Cena, then got into a feud with Triple H which would see him lose at WrestleMania 29. Brock Lesnar was formidable force, but far from the god of war we usually think of him as today.
It was the match with The Undertaker at WrestleMania 30 that changed the equation. Lesnar's win was one of the biggest shocks in WWE history, and that would be notable enough on its own, but this match altered the trajectory of the company for the rest of the decade and indeed, now into the 2020s.
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Formidable before, this match gave Brock Lesnar pseudo-godhood powers in a WWE ring. Lesnar spent the next half of the decade destroying almost anyone else he came across, and the storyline to dethrone him was, and unfortunately, still is, the central focus of the company.
Though this list isn't a strict ranking, this was without question the most important match in the company of the 2010s.