Bruno Surace stunned the boxing world. The Frenchman went on the road and knocked out Jaime Munguia with a right hand in the sixth round of the super middleweight main event Saturday evening at Estadio Caliente in Munguia’s hometown of Tijuana, Mexico.

After a quiet opening round, Munguia gave the home crowd something to cheer about in the second, knocking down Surace with a counter left hook to the chin. Surace (26-0-2, 5 KOs) survived the round, but his tendency to lean against the ropes offere...