Gennady Golovkin and Denis Grachev working on strength up in Big Bear

VISIT http://www.HustleBoss.com FOR MORE EXCLUSIVES More coverage from Abel Sanchez' gym in Big Bear, California, as Denis Grachev (13-1-1, 8 KO's) and Gennady Golovkin (26-0, 23 KO's) put in some strength work as their upcoming bouts creep closer...