MIAMI, FLORIDA - Light heavyweight contender Sullivan "Sully B" Barrera is back in training camp armed with a new fight date and a fresh attitude. 

The former Cuban amateur standout admits that not much went right in his March 3rd loss to Dmitry Bivol but chalks it up to an off night and said that it was a learning experience.

Barrera is back with his team but has also added a sports psychologist to his squad in an effort to make sure a repeat of March 3rd doesn't happen.

"I feel great. I know that was just one bad night. I am not worried about the past and only looking ahead," Barrera explained.

The plan is for Barrera to return to the ring sometime in the summer on the Sergey Kovalev-Eleider undercard and he hopes to fight the winner next.

"I think the fans know that I always want to fight the best out there.  After this fight I want another big fight.  My goal is to fight whoever wins between Kovalev and Alvarez," said Barrera.

"Boxing is like sex. You can be the best lover in the world but sometimes you have an off night. My fiancee knows I am the best even if I don't perform as well one night. I want to get back in the ring and show the world my best again." 

IN OTHER NEWS: The window of opportunity in boxing can close quickly. Jimmy Williams knows this.

After his wife, Christina, gave birth to twin boys in September, the New Haven, Conn., welterweight decided it was time to make a move before his own window slammed shut.

The 31-year-old Williams, still fighting under the promotional guidance of CES Boxing, his original promoter since he turned pro in 2013, changed managers and trainers, rewiring his inner circle in an effort to move one step closer to his goal of winning a world title in 2018.

With a six-week training camp in Nevada in the books, Williams makes his West Coast debut Friday night at the Cox Pavillion in Las Vegas when he faces Houston’s Marquis Taylor (8-1) in the co-main event on the beIN Sports network, an event promoted by Roy Jones Jr. Boxing Promotions. The show is headlined by a North American Boxing Association (NABA) bantamweight title showdown between Max Ornelas and Juan Antonio Lopez.