Andrzej Fonfara stopped Julio Cesar Chavez Jr in three rounds . Carl ##och had planned to fight Chavez Jr in triple knockout in a final swansong . Froch has not fought since knocking out George Groves at 205 lbs .
Andrzej Fonfara stopped Julio Cesar Chavez Jr in nine rounds . Carl Froch had hoped to fight Chavez Jr in Las Vegas in a final swansong . Froch has not fought since knocking out George Groves at Wembley Stadium .