By Chris Williams: Floyd Mayweather Sr. sees his son Floyd Jr. having a lot of problems trying to beat WBA junior middleweight champion Miguel Cotto in their fight next month on May 5th, according to the latest boxing news. Mayweather Sr. doesn’t think Cotto will win, but he believes that it’s going to be a really hard fight for Floyd Jr. because he’s older now and more vulnerable than he was in the past.Mayweather Sr. said to eastsideboxing.com’s On the Ropes Boxing Radio program “I think Cotto will probably give little Floyd a better fight than any of the other guys in quite awhile. I’m not saying Cotto’s going to win.” Mayweather Sr. added that he believes Floyd Jr. will have a problem eventually when he’s matched against a fighter that throws a lot of punches, someone younger. He said “His [Mayweather] trouble is going to be with a guy that’s consistently throwing punches…When he’s got someone that’s real, real busy, and that will more or less probably be a younger guy.” Trainer Freddie Roach has said in the past that he likes the match-up between Manny Pacquiao and Mayweather, because he thinks Pacquiao would overwhelm Mayweather’s ability to counter punch enough by throwing 80+ punches per round to where Mayweather won’t be able to keep up. It sounded like a reasonable opinion back when Roach gave it over a year ago, but in looking at 38-year-old lightweight Juan Manuel Marquez, who isn’t as fast as Mayweather, counter punch Pacquiao all night long last November, it’s clear that Mayweather would have little problems with Pacquiao’s work rate. Cotto could be a problem for Mayweather next month if Cotto comes into the fight weighing close to 170lbs. The weight limit is 154, so you got to figure that Cotto will put on at least 10 to 15 pounds of water weight after he rehydrates following the weigh-in the day before the fight. If he only puts on 10 pounds, that’s still a big 164 pound fighter Mayweather will be in with. And if Cotto comes in at 170, it’ll be difficult for Mayweather because he’s more of a welterweight than a true junior middleweight.