Tempers flared up as WBO/WBA/IBF light heavyweight champion Sergey Kovalev and Canadian superstar Jean Pascal traded words and then engaged in a brief shoving match at their final press conference. Pascal, a former WBC champion at 175-pounds, will challenge Kovalev for the titles on Saturday night before a hometown crowd at the Bell Centre in Montreal, Canada. HBO will showcase the fight as the headliner of a televised tripleheader.