This victory of 6-0 is the largest margin ever inflicted by a Brazilian club on an Argentinean one in the history of the Libertadores. RIO DE JANEIRO, Brazil - Striker Dodo scored a pair of goals and set up two more Wednesday to lead Fluminense to a 6-0 rout of Argentina's Arsenal and into first place in Group 8 of the Copa Libertadores. The victory gave Fluminense 4 points in Group 8, tied with Ecuador's Liga de Quito, but the Brazilians hold first place on goal average. Arsenal is third with 3 points, while Paraguay's Libertad has 0. It was a triumphant return to Maracana stadium for Fluminense, which hadn't played a Libertadores game in the temple of Brazilian soccer since 1985, a year after its only Brazilian national title. Before a raucous crowd dressed in Flu's red, green and white jerseys, the "tricolors" quickly dispatched Arsenal. At 14 minutes, Thiago Neves sent a free kick from the right side into the far corner of the net for a 1-0 lead. Junior Cesar centered from the left baseline 10 minutes later, and Dodo leaped in the penalty area to fire a shot into the right corner to the second goal of the match. In the final minute of the half, Dodo dribbled through the Arsenal defense and passed to Gabriel streaking in from the right side. The wing back chipped the ball over Arsenal goalkeeper Mario Cuenca to send his team to the break with a 3-0 lead. Dodo got his second goal in the 51st minute in a spectacular play. Midfielder Thiago Neves centered from the right <b>...</b>