By Andrew Downie SAO PAULO, Dec 8 (Reuters) - Dozens of fans fought a savage battle on the terraces at a Brazilian championship match on Sunday, interrupting play for more than one hour and leaving at least three people reportedly hospitalised in serious condition. Shocking television pictures showed at least two stricken fans being kicked and stamped on by an angry mob of rival supporters during the match between Atletico Paranaense and relegation-threatened Vasco da Gama. More...