How many more blows can boxing take?

On March 26 a British middleweight boxing title fight between Chris Eubank Jr and Nick Blackwell ended with distressing scenes.

During the 10th round, the referee stopped the fight as a bloodied Blackwell, whose left eye had swelled markedly, appeared to have no more to give.

While still in the ring, Blackwell collapsed. Bleeding had begun on his skull and Blackwell subsequently spent nine days in a medically induced coma.