Despite Anthony Joshua putting Ruiz down in round three, the new champion went on to put Joshua down twice in the same round before disrupting whatever plans Joshua had with his hand speed and power.
Anthony Joshua seems confused throughout the fight and was largely fighting to survive despite been the bigger man.
This shock was almost as seismic as Mike Tyson’s defeat by Buster Douglas. Not quite as massive since Joshua has not achieved such greatness as Iron Mike but remarkable because it was delivered by a Mexican warrior we had foolishly under-rated because of his unathletic appearance.
And Tyson did not surrender the way Joshua did after one minute and 27 seconds of the seventh round.
Joshua, with however much of his self-belief is left, will enforce his rematch clause but there can be no certainty that the outcome will be any different. Even though that fight will be in London.
Whether he will ever fight his nemesis Deontay Wilder again, let alone for the cherished undisputed championship, is hardly a question worth putting now.