Brazil captain Marquinhos apologized to the fans on Tuesday after they suffered their heaviest defeat in a World Cup qualifier with a 4-1 thrashing by bitter rivals Argentina in Buenos Aires. Five-times World Cup winners Brazil have won just once in their last four games and Marquinhos urged his team mates to turn things around as quickly as possible. "What we did here today can't happen again," he told Brazilian TV Globo. "It's hard to talk about it in the heat of the moment... It's