Ahead of the first defence of his World Titles in Philadelphia live on BoxNation this Saturday, Julian 'J-Rock' Williams has an ambitious target in mind.

After upsetting Jarrett Hurd to become WBA & IBF World Super-Welterweight Champion last year, Williams hopes a prosperous 2020 could propel him up the pound-for-pound rankings.

While he admits the Hurd victory brought him "a little more notoriety," the 29 year old believes the hard work has only just begun.

"To be honest with you, I stopped thinking about it," he explained to PhillyBoxingHistory.com. "I want to stay focused on the task at hand, and the task at hand is becoming the pound-for-pound best in the world.

"I’m not just satisfied with being the best Junior-Middleweight in the world. I’m not just satisfied with being the Unified Champion of the world.

"Why sell myself short when I’ve got the ability and the drive to be the best pound-for-pound best fighter in the world? I’d be selling myself short. I’d be leaving millions of dollars on the table."

Many boxing observers put multi-weight World Champions Vasyl Lomachenko, Canelo Alvarez and Terence Crawford top of the mythical pound-for-pound lists, so Williams would need to add some more scalps on his record to achieve his goal.

He could be set for a rematch with Hurd should they both come through their next bouts this month, with Hurd fighting live on BoxNation on January 25th. Williams could also target his only conqueror and WBC titlist Jermall Charlo, who knocked him out in five rounds three years ago.

For now, 'J-Rock' knows he has to deal with the hard-hitting Jeison Rosario: "I ain’t going to kid everybody. I don’t think it’s a difficult fight. You know what he brings to the table? Ambition. I think he’s an ambitious kid."

"I just think it’s a matter of being focused and on top of my game and I think I’ll take care of him."

Watch Julian Williams v Jeison Rosario live on BoxNation on Saturday night from 1am.