Terri Harper predicts Caroline Dubois' "bad ego" and conditioning will decide Sunday's WBO/WBC lightweight unification fight at London's Olympia.

Harper, a three-division world champion, believes Dubois' overconfidence and fading workrate in later rounds will cost her. "She tries to admire her own work," Harper said, calling Dubois' fading engine a liability. The Briton plans to outwork her opponent in the second half,"Harper said, "If she doesn't get me out in the first half then she's lost."

Dubois, aiming to become undisputed, faces pressure to validate bold claims. Harper, 27, sees this as her career's pinnacle: "This is the fight I've always wanted." The winner could dominate the lightweight division, with Harper targeting undisputed status.

Fans can stream the April 5 showdown via Sky Sports or NowTV. Harper's promoter, Matchroom Boxing, emphasizes the event's historic scale, positioning it as a career-defining moment for both fighters.