The original matchmaking was risky from the beginning. The Cuban southpaw is 40, and Queensberry was relying on an aging fighter to complete camp and reach fight night. His withdrawal has left Junior with a substitute who will have only a few days to prepare.

Perez still would have given Junior a specific technical test. His southpaw stance, experience and counterpunching would have forced the 23-year-old to manage distance, adjust to different angles and avoid becoming reckless when attacking.

Musah presents a completely different style after Junior spent camp preparing for Perez. That may require a quick ta