Series documents the 40 days of training that boxers undergo before a fight.
Gennady Golovkin
Self - Former Unified Middleweight Champion
Max Golovkin
Self - Gennadiy's Brother
Johnathon Banks
Self - Gennadiy's Head Coach
Steve Rolls
Self - Contender
Tommy Howat
Self - Steve's Boxing Coach
James Lockwood
Self - Gennadiy's Nutritionist