Chavez Jr challenges Hopkins to fight Golovkin on his Chavez Jr-Froch card

By Dan Ambrose: Former WBC middleweight champion Julio Cesar Chavez Jr (48-1-1, 32 KOs) is challenging 50-year-old Bernard Hopkins (55-7-2, 32 KOs) to fight knockout artist Gennady Golovkin (31-0, 28 KOs)