The date, timings and the venue for Floyd Mayweather's last professional fight in September have been decided, but very few boxing fans are excited about it as the American has picked former world champion Andre Berto as his opponent. Berto has lost three out of his last six fights.

Before retiring as a professional boxer, boxing fans and experts would have loved to see Mayweather fight a tough opponent and strengthen his claim of 'The Best Ever'.

But the best pound-for-pound boxer has defended his choice of Berto. "I chose Berto because he's very exciting," said undefeated welterweight world champion Mayweather.

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"Berto is a tough competitor, a former world champion. Every time he goes out he gives it 100%," he added.

Though Berto is a former champion, there were plenty of other boxers who could have proved to be a huge challenge in Mayweather's farewell fight in September. Boxers such as Amir Khan and Gennady Gennadyevich Golovkin could have made the fight an exciting affair, but Mayweather decided to choose Berto.

After Mayweather defeated Manny Pacquiao in May in the 'fight of the century', the American stated that he will have his last fight in September. Since then, Amir Khan had been touted as his next big opponent.

Not only are boxing fans disappointed with Mayweather's choice, but also wondering why his opponent is not Khan, who had in the past, come close to a mega fight against the American. Khan's dream to fight Mayweather has been shattered.

With Mayweather up against Berto, the world's richest athlete is expected to clean up his opponent and remain undefeated in his professional career, which has seen him win all his last 48 fights.

However, Berto seems to be positive ahead of the fight at the MGM Grand in Las Vegas as he feels the fight should have taken place some few years ago. 

"We should probably have had this fight a few years back but everything happens for a reason and the time is now," said Berto.

The bout between the two is going to make Mayweather richer by at least $32 million. His last professional fight will be aired live on Showtime pay-per-view.