Teams coached by Mourinho have always been known for very strong defense, but for some reason that’s not the case at Fenerbahce. Perhaps it’s because he doesn’t have defenders here who could ensure such a solid defense, or maybe he wants to make Fenerbahce a more attacking team, even if their defense becomes less reliable. I think it will be very difficult to keep a clean sheet away against Benfica. Therefore, besides having a good defense, they will definitely need to score, a very tough situation for Fenerbahce.
He didn't early against Feyenoord, but he does now. Semedo, Skriniar, Oosterwolde, Archi Brown. Those are very solid guys and the defense should be impeccable for them, they look great. Amrabat helps with the defense as well, he is a national team level player and doesn't deserve the hate he gets.
I think the problem with Fenerbahce is not their defense, they can defend like hell, the problem is not being able to find scoring chances. They have two strikers, Duran and En Neysri, and they are both amazing strikers, they have amazing defense too, the only problem they are facing right now is bringing the ball from that defense, to that offense. If they can somehow figure that out, they will be doing a lot better.