He a champion. He got two titles at that.
And I don't want to hear none of that after I beat him."
Ennis believes his versatility will be the difference.
"The difference between me and him, it's so many fighters that fight like him in this boxing game.
I seen him many times. He never seen nobody like me."
A Philadelphia Family Affair
Ennis's pursuit of greatness is deeply rooted in family.
His father, Derek "Bozy" Ennis, trained him and his older brothers, Derek "Pooh" and Farah, who were promising contenders but fell short of world titles.
Boots watched and learned. "That's all I seen," he said.
"I wanted to be like that when I got older."
His brothers' experiences taught him the importance of focus.
"That was my part, just to take my last name to the next level, and that's what I'm doing."
The nickname "Boots" itself originated from a childhood mispronunciation of "Boops" by gym regulars.
Bozy's most important lesson was about authenticity. "Always be yourself.
Don't be no follower. Be a leader.
Stay to yourself. You don't need a bunch of people around you.
Have a nice small circle and people that you can trust."
Ennis carries himself with calm assurance, rarely engaging with social media during camp. The transformation, he says, happens only on fight night.
One criticism that does bother him is the perception of defensive flaws. "I feel like people be underlooking my defense," he said.
"My defense is really crazy.
I feel like one person said one thing and then all of a sudden I get hit too much.
They're going to see on fight night though."
Looking ahead, Ennis envisions a legacy that inspires future generations.
"When my career is done and I retire as an undefeated legend, the best in the world, the best ever," he said.
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"I want people to say: 'I want to be like him when I get older.'"