Argentina boss Diego Maradona has undergone facial surgery after receiving a bite by one of his dogs, local media reported on Tuesday. The 48-year-old was sent to Los Arcos clinic but his injury was not serious, according to broadcaster Cronica. Maradona received treatment at the same clinic three years ago after suffering from alcohol-related problems. The Argentina legend, who took part in four World Cup finals, is set to lead the South American titans in this year's showdown in South Africa.