Jamie McDonnell retained his WBA bantamweight title after opponent Javier Chacon was forced to retire due to a shoulder injury.
Less than 40 seconds into the tenth round, Chacon pulled up, turned to his corner and shook his head, gesturing to his shoulder.
It was a disappointing end to the night for a game fighter who gave his Doncaster foe a testing time in what was expected to be a simple night’s work.
Argentine Chacon was a particularly tough nut to crack, given McDonnell towered over him even before he regularly squatted to throw shots.
He had plenty to say in the first half of the fight and McDonnell only really convinced in the fourth when he made the Argentine wince with a hefty hook to the body before following up well.
But after the tricky first six rounds, McDonnell stepped up his efforts and began to find more success, particularly with the right hook to the head which landed consistently.
It is unclear when Chacon injured his shoulder - apparently a dislocation - but he was in a great deal of discomfort after landing a hook directly to McDonnell’s hip bone in the seventh round.
Through injury and clear fatigue, Chacon faded considerably as the fight neared its conclusion and McDonnell looked set to cruise towards the finish, perhaps even hinting at a potential stoppage as the accuracy of his shots only increased.
But there was no nervy wait for a points decision nor push for a stoppage as Chacon withdrew early in the tenth, sending McDonnell on his way to a unification fight with WBO champion Tomoki Kameda in Las Vegas.