Players at the World Cup could face a red card if they cover their mouths when speaking to opponents during confrontations. The decision was taken during a special meeting of the International Football Association Board (Ifab) in Vancouver, Canada, on Tuesday, where two Fifa-proposed law amendments were approved. Players who leave the pitch in protest at a referee's decisions could also now face a red card, following ugly scenes at the Africa Cup of Nations final between Morocco and Senegal. Both law changes have been approved as competition opt-ins by the Ifab . Fifa has confirmed they will be adopted at this summer's World Cup. The issue of players covering their mouths became high profile in February when Benfica winger Gianluca Prestianni raised his shirt while speaking to Real Madrid's Vinicius Jr during a Champions League game. The Argentina international was accused of racist abuse and provisionally banned for one match.…