Floyd Mayweather takes on Andre Berto in what he says is his final fight ...

Floyd Mayweather ends his phenomenal career under a shadow, George Groves sees world championship light at the end of his dark tunnel.

Mayweather goes into his 49th and what he insists will be his last fight in the immediate aftermath of doping allegations.

As he protests his innocence, Groves promises to shine on the undercard by defeating WBC super-middleweight champion Badou Jack in knockout style.

If he goes ahead with his planned retirement it will leave questions hanging over the Vegas Strip. If he fights a couple more times, under the stringent testing conditions he imposes, he can reinforce his reputation as a leading anti-drugs campaigner.

By contrast, no problems of any kind are besetting Saint George of Hammersmith as he prepares for his third world title challenge.

The doubting days which followed his second, and most brutal, knockout by Carl Froch are behind him now. He has kicked his risky habit of leaving it to the last 48 hours to take off any surplus poundage.

Groves looks as relaxed and happy as he is fit and healthy.

Source: UK Daily Mail