Sergio would lose against Bernard Hopkins, peak James Toney, and may be Jermaine Taylor at his best which was a short peak. I think Sergio would beat Kelly Pavlik, Julian Jackson in an exciting fight as well as John David Jackson, Jorge Castro, Reggie Johnson and Quincy Taylor.

I know Sergio is willing to fight at light middle but do not think he could beat a peak Oscar De La Hoya, Felix Trinidad, Fernando Vargas, Terry Norris Winky Wright but he may be able to handle Shane Mosley who was never a great light middle anyway. Segio should be able to beat Gianfranco Rossi, do not know about Julio Cesar Vasquez, who was very strong at the weight but would beat Laurent Boudouani.