Chelsea cannot win Fluminense. The game will most likely end in Fluminense win or draw.
I respect the fact that has come a long way in this competition, but Fluminense has shown solid strength in this competition under the leadership of Thiago Silva, his tactics last game helped the team. And dont forget he is an ex-Chelsea player, meaning he knows a lot about the team, most especially, the goal keeper.
Well, I also think the same as you so I also prefer to favor Fluminense. Because I think Fluminense is like a team that continues to surprise and makes the opponents they face always unprepared for the strategy that Fluminense will use. In terms of squad depth, Chelsea actually looks even better. But I think in terms of playing effectiveness I really see Fluminense having that. So it looks like Fluminense can win this match. Although I'm not 100% sure, I think the chances are quite big. But I know Chelsea is also a strong team. And when Chelsea are at their best then yeah Fluminense will probably lose. But the problem is that I doubt Chelsea will be at their best.
If we can see Fluminense play the way we all have been watching them play before the semi-finals, then maybe we will see a very competitive game. Because Chelsea is not the way we think of Chelsea, Chelsea is definitely a very strong team. Chelsea is going through a very bad time, that's why we think of them. Chelsea is not a very bad team. I think Chelsea will win the game between Chelsea and Fluminense. Although it is impossible to say what will happen in the game, I also think Chelsea will win.