Just a few days removed from welterweight champion Floyd Mayweather Jr.'s dismantling of interim titleholder Robert Guerrero on Saturday night at the MGM Grand in Las Vegas, Golden Boy Promotions CEO Richard Schaefer told ESPN.com on Thursday that he already is working on Mayweather's next fight.

Schaefer said he is hopeful of finalizing a fight between Mayweather, the pound-for-pound king, and unified junior middleweight champion Saul "Canelo" Alvarez, a match that looms as one of the biggest in boxing.

"I am working on the fight," Schaefer said. "I'm crunching the numbers. You should see my calculator -- it's red-hot. I am working on a lot of fights, but this is my No. 1 priority."

Schaefer, who promotes Alvarez and works with the 36-year-old Mayweather (44-0, 26 KOs) on a fight-by-fight basis -- but has promoted all seven of his fights since 2007 -- wants to make the fight.

"This is something I am pursuing, and I am having conversations with both sides," Schaefer said. "Canelo wants the fight, and Floyd has never turned down an opponent."

When Mayweather announced in December that he would fight on May 4, he also said he would fight twice in 2013 with the second date, Sept. 14, back at the MGM Grand. It's an ideal date to face Alvarez, one of Mexico's biggest stars, because it is the weekend of Mexican Independence Day, a traditional weekend for a major fight involving a top Mexican fighter. Mayweather's fights against Victor Ortiz (2011) and Juan Manuel Marquez (2009) were on the same weekend.

Alvarez (42-0-1, 30 KOs), 22, cemented his status as the top 154-pounder in the world on April 20 when he outpointed Austin Trout to unify two world titles in front of a sold-out crowd of 39,247 at the Alamodome in San Antonio.

Mayweather has not fought twice in a four-month span since 2003 but reiterated at the news conference after beating Guerrero that he planned to return quickly.