Former unified junior middleweight champion Julian Williams is backing his fellow Philadelphian, unbeaten welterweight contender Jaron "Boots" Ennis, to defeat the top fighters in his weight class.

In a recent interview, Ennis explained that he's fully capable, right now, of beating WBO champion Terence Crawford, WBC/IBF champion Errol Spence and former champion Keith Thurman.

"I agree with him, sometimes I think experience is overrated. Nobody is going to test him at the level he’s at. Really he’s a 54, in a 47 body, and he’s got the power of a 60 pounder and the speed of a 47. He’s got to fight the top level guy to get better, but it depends on who’s willing to step in there and fight him. He’s definitely going to be a champ, it’s not a matter if, it’s just a matter of when," Williams told the Last Stand Podcast with Brian Custer.

Ennis (27-0, 25 KOs) was in action last month, when he blew away former world champion Sergey Lipinets with a vicious sixth round knockout.

Williams is back on June 26 in a crossroads fight with once-beaten Brian Mendoza. The fight, which is part of the Gervonta Davis vs. Mario Barrios Showtime pay-per-view, will be the first ring appearance for Williams since he suffered a shocking knockout loss to Jeison Rosario in January of last year.

In the aftermath of his loss, Williams parted ways with longtime trainer Stephen "Breadman" Edwards.

"The main thing is I think I needed a change, and that’s not necessarily a bad thing. Sometimes relationships get stale, I mean Tom Brady left Belichick and you can see what he did. Sometimes a fresh start is good. To be honest, there’s some issues that me and him got that didn’t necessarily work out, and if we do, we do, if we don’t, we don’t! I’ll be fine," Williams said.