By Edward Chaykovsky

Abel Sanchez, trainer of WBA/IBO middleweight champion Gennady "GGG" Golovkin, expects Floyd Mayweather Jr. to continue his career beyond the upcoming return date of September 12th at the MGM Grand in Las Vegas.

Mayweather will return against Andre Berto and says the upcoming defense will be the final fight of his 19 year career.

Golovkin is back on October 17th, when he faces IBF champion David Lemieux in a unification at New York's Madison Square Garden.

If Mayweather continues to fight, Golovkin is still willing to drop down to the junior middleweight limit of 154-pounds to fight him. Mayweather holds the WBC/WBA world titles at 147 and 154 - but he's not fought at the full junior middleweight limit since a May victory over Miguel Cotto in 2012.

"I think he fights again, I don’t think it’s over. I think that Mayweather is too much of a historian and too much of a businessman to think that all he wants to do is finish out and hold the record. I think that he’s going to look for challenges beyond that, and if we’re in the mix, Golovkin has professed that as his dream fight for his career. If it happens, I can promise you this, it won’t be a May 2nd fight, Golovkin will stop him," Sanchez told On The Ropes Boxing Radio.