Recent form highlights an important difference: Fluminense are coming into this match in a much stronger position, having suffered just one defeat in their last 13 matches, while Vasco have managed to win only 2 of their last 10 games. In the first leg of a Round of 16 tie, where caution can play a major role, I believe Fluminense have enough arguments to either win or, at the very least, avoid defeat. Therefore, Fluminense (Draw No Bet) looks like an interesting option for this Maracanã derby.