Boxing: Tyson struggling in training

Mike Tyson broke down in agony during a workout at the Central Boxing Club gym in Phoenix, Arizona, where the former two-time world heavyweight champion is preparing for his ring return with trainer Freddie Roach. Tyson was mid-way through only his third sparring session in 17 months when an old problem, back pains, caused crippling muscle spasms and left him contorted on the canvas.

He remained on the floor, pain etched on his face, for several minutes before telling assembled reporters: "Sorry you had to see something bad. I really wanted to box good for you guys."