Pound-for-pound king Floyd Mayweather Jr. could be eyeing Manny Pacquiao as his last opponent before he closes out the curtain of his legendary boxing career in September 2015. Following Mayweather's announcement of his possible retirement from the sport at the end of his six-fight deal with Showtime Boxing, speculations immediately flooded several boxing forums as boxing fans talked about the never-ending Mayweather vs. Pacquiao saga.

Mayweather, who will likely pick Amir Khan as his next foe for his May 3rd fight at MGM Grand Garden in Las Vegas, Nevada, said that he's going to leave the sport at the expiration of his current contract with Showtime Boxing.

"Mayweather told guests at a gala dinner in South Africa on Friday that he remembers his first fight when he was a kid in 1987, and that "September 2015 will be my last," via the Associated Press.

The Grand Rapids native had already racked up over a 100 million in just his two fights with Showtime boxing and the fight purse for him could skyrocket even higher with his May and September fights.

Khan is not considered an elite level boxer, but his huge fanbase in the United Kingdom will certainly make him a solid business choice for Mayweather than any available opponents out there not named Pacquiao.

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Showdown with the Pacman

Golden Boy Promotions fighters such as Danny Garcia, Keith Thurman, Marcos Maidana, and even Adrien Broner are the names expected to be lined up for Mayweather in his last three fights after Khan. However, there's no more intriguing and bigger opponent out there than Pacquiao, who could certainly help Mayweather seal his legacy as the boxer of his generation.

As for Pacquiao, he must make his own move as well in order for his dream fight with Money May to happen. Mayweather stressed that he won't fight Pacquiao as long as he's affiliated with Bob Arum's Top-Rank boxing. Pacquiao, who will become a free-agent in 2014, did not rule out the possibility of setting a meeting with Mayweather's camp next year.

Despite Mayweather's stance not to fight Pacquiao again, the Filipino fighting congressman will always be roaming around within his vicinity. The 35-year old Pacquiao also admitted that he has two years left before he retires as well, and there's indeed no better way in ending the career of these two great gladiators than a showdown in September 2015.

For more 2014 Boxing News update, read more at IBT Sports