Gennady Golovkin has been considered the best middleweight since Sergio Martinez struggled to beat Martin Murray in 2013 and yet he remains ostracized from the elite level .
Sergio Martinez is perceived to be an unknown quantity .
Gennady Golovkin has been considered the best middleweight since Sergio Martinez struggled to beat Martin Murray in 2013 and yet he remains ostracized from the elite level because he is perceived to be an unknown quantity .