11.   Ledon knocked down Garcia in the second and opened up a cut on his head with an accidental head butt.

12.   Las Vegas plastic surgeon Barry Markman said the injury was caused by an accidental head butt about three and a half weeks ago during a sparring session in Florida.

13.   Loughran fought a no-contest last year with Beltre when the Dominican was stopped on cuts after an accidental head clash with the Northern Irishman.

14.   Many believe Randall was leading that fight against Chavez when it was stopped after an accidental head butt in the eighth round.

15.   Referee Charlie Lucas ruled the injury had been caused by an accidental head clash.

16.   Daorung sustained the cut as a result of an accidental head butt.

17.   Under WBA rules, if an accidental head butt stops the fight after three rounds, judges go to the scorecards to decide the fight.