Andre Berto is having a tougher training in his attempt of spoiling Floyd Mayweather Jr.'s plan of tying the 49–0 record of the great Rocky Marciano.
"I've had a tremendous training camp, a long camp but a tremendous camp. I've never run harder. I'm definitely in the best shape that I've ever been in," Berto told reporters Tuesday.
The two-time welterweight champion also said that he is working with different sparring partners.
Berto added that he believes Mayweather is "very skilled" but he has the speed, power, and athletic ability to keep up.
Mayweather's selection of Berto as his final boxing opponent before he retires was a stunner to many since the latter is not among the top contenders expected to be chosen.
Berto is 3–3 in his last six fights but is currently riding a two-fight winning streak beating Steve Upsher Chambers via unanimous decision and Josesito Lopez via technical knockout in his last bouts.
The 31-year-old understands that Mayweather is heavily favored and that he is the underdog, but promised before that he will be delivering a knockout.
When asked by reporters what a victory over Mayweather means, Berto answered, "It would be something huge, not just for me but for the sport."
He also said, "Floyd has been an icon for quite some time now and he's on his way to try to match a record. So for me, being the gym-hungry fighter coming in to take that away from him, that would be huge."
Despite being the favorite heading to the bout, Mayweather has been praising Berto in his recent interviews saying that he will be pushed by his next challenger.
The 38-year-old number one pound-for-pound also told Dan Rafael of ESPN that he is pushing himself more this time than during his fight against Manny Pacquiao and will not be overlooking Berto.
Mayweather also promised that this fight will be an entertaining one unlike his last match against Pacquiao, which lacked action.
