Oleksandr Usyk's dominance in the heavyweight division has sparked debate about his place among the all-time greats. BBC Sport examines Usyk's achievements and analyzes which contemporary fighters possess the skills and strategy to potentially defeat the Ukrainian champion. The article explores the challenges Usyk presents to his opponents, focusing on his technical prowess, ring intelligence, and overall impact on the sport. It also considers the strengths and weaknesses of potential challengers and assesses their likelihood of overcoming Usyk's formidable defenses.