Provided boxing legend Floyd Mayweather Jr. outclasses current interim WBC welterweight champion Robert Guerrero on May 4 at the MGM Grand in Las Vegas, Nevada, “Pretty Boy” is expected to throw fists with Mexican superstar and WBC light middleweight titleholder Saul “Canelo” Alvarez on Sept. 14.

The 35-year-old Mayweather (43-0, 26 KOs), a longstanding WBC world welterweight champ who was named The Ring “Fighter of the Year” in 1998 and 2007, last battled on Cinco de Mayo when he overcame powerful Puerto Rican icon Miguel Cotto by unanimous decision to acquire the WBA (Super) & WBC Diamond light middleweight titles.

Conversely, the 29-year-old Guerrero (31-1-1-2, 18 KOs), also a former WBA and WBO lightweight and two-time IBF featherweight king, most recently earned a violent unanimous decision triumph over Andre Berto on Nov. 24 at Citizens Business Bank Arena in Ontario, Calif.

Roger “Pit” Perron is a venerable boxing trainer from Brockton (Mass.) who now works with Mike and Rich Cappiello at their gym, Cappiello Brothers Boxing and Training.

“Floyd is the best there is today,” said Perron, 75, who worked with International Boxing Hall of Famer Marvelous Marvin Hagler at the Petronelli Brothers Gym. “He can’t be touched by anyone near his weight.”

Despite being a cocky jackass and convicted domestic abuser, Mayweather, a bronze medalist as a featherweight at the 1996 Olympics in Atlanta, is a prizefighter for the ages who absolutely remains “the best there is today.”

Nevertheless, it’s apparent that Guerrero is legitimately tough and his unorthodox stance could pester the “Pretty Boy.”

Furthermore, Mayweather isn’t getting younger and his inactivity and stint behind bars can only work as a hindrance.

Regardless, in a bruising clash, Mayweather will undoubtedly find a way to outdo Guerrero when they battle roughly four months from tonight.

Meanwhile, the 22-year-old Alvarez (41-0-1, 30 KOs) easily defended his crown against interim WBC welterweight champion Josésito López in September at the MGM Grand Garden Arena in Las Vegas, Nev.

Alvarez, who began boxing professionally at the ludicrous age of 15, is tentatively slated to clash with WBA light-middleweight titlist Austin Trout in a separate bout on the same evening as Mayweather on May 4.

"Eric Gomez, [vice-president] of Golden Boy Promotions, came to Guadalajara and we agreed that Saul and Floyd would share the evening in May," Alvarez trainer "Chepo" Reynoso told Boxingscene. "We already reached a financial agreement [for May], and a guarantee that we will face [Mayweather] in September in Las Vegas. We believe that it is time for Canelo to show what he is made of."

The likable 27-year-old Trout (26-0, 14 KOs), a southpaw who is a native of Las Cruces, N.M., is a defensive wizard with a prolific jab and great intelligence.

Unfortunately for Trout, Alvarez, considered the elite welterweight prospect in the world, possesses thunderous power in both fists and he will floor the New Mexican within 10 rounds this spring.

If all goes accordingly, win, lose or draw, Saul Alvarez will punish Floyd Mayweather and “show what he is made of" in the autumn.