Klopp had clear ideas how to replace his current players with the ones fitting to his style. Mourinho from the other hand is only whining. It strange that in all of his recent teams, Mourinho couldn't take the players he wants, or at least this impression I get, when I'm reading this constant complaining about the players. Let's see what he will build in Roma, but I don't believe that he will finish even his second season there. For example, Sarri said that some of his players cannot play Sarriball, and he'll definitely go for an overhaul in the summer, but at least he knows what he wants, unlike Mourinho.
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You're drawing conclusions based on lack of information. The only thing you see and care about is the result. Sure, as a fan that's all you're going to care about, but football management is not only about results, it's about process.
You talk about Conte and Inter, the truth is that Inter was a CL side for two years when Conte arrived and there was internal conflict that Conte did not find here. He had a blank checkbook to sort out the team. That's a coach's wet dream.
Mourinho on the other hand found players that he had discarded at his previous job have a role at Roma (Mkhitaryan and Smalling), only got rid of Pedro who I imagine was a personal choice rather than a tactical one [they go way back from the Barcelona-Mourinho rivalries and there's not much amity there], his best players are injured (Zaniolo, Spinazzola), his team spent money on Kumbulla who he did not rate because of previous conditions and he asked for 8 players to fill specific spots and they only got him 4+1. The +1 being Kumbulla.
They spent 100m as you say and the roster looks inferior to last season's! Dzeko is not replaced. The impact is just not there. Their only quality signing was that South American left back but he's only 'quality' enough for Roma. Everyone else they signed is not Roma material. Mourinho's presence cannot compensate roster deficiencies anymore, this is why he's "whining". He's expected to pull rabbits out of his ass because he's Mourinho, despite having to coach incompetent players or brats. That's not how football works.
Sarri has a system but we're not seeing it at Lazio. Lazio was utter shit until Sarri realized he has to change his approach to a more counter-attacking style. This isn't Sarriball anymore. And it's not like it's really working, either. But at least Sarri has a couple of very good players, and a world class midfielder to top that, whereas Roma has nothing but a collection of washed up rejects and a few domestic talents that are either unavailable or unable to carry the burden throughout the season.
Pinamonti over Abraham?! Lol, Tammy is more much better currently. At least he can create something on his own unlike Pina.
Pinamonti cost Empoli nothing and he's doing far better than Abraham is, who keeps messing up chances, loses out to his defender all the time and is the main reason why Roma cannot get it going whenever he's heavily involved.
Pinamonti is not a great player. Neither is Abraham. I wouldn't pay 20m for either, but if I had to choose for 20m as if my life depended on it, I'd pick Pinamonti. Abraham cost 45m, with no guns pointed at Friedkin's face.
The only reason Friedkin bought Roma is to flip the team to some richer dude, trying to gauge their attention which is fixated at the PL market, by having PL players there and hoping to reach a deal for a new stadium. Mourinho is part of that package, he's not there to build a team. Maybe Mourinho thought he could get his way, but it doesn't look likely. It will take a while for the Roma fans to accept their current situation and they'll keep attacking the players, the coach, whether that's Fonseca or Mourinho, the director. But it's a new Arsenal situation, without the stadium, without the revenue and without the patience of the fans. It's bound to fail.
You need to embrace the football reality, not think of the game's protagonists as the players and coaches. This isn't a video game, life isn't this way. These guys are guest stars in the main show. The owners run it. They dictate policy. If you fluke out a result during this sporting incompetence, good on you. But it shouldn't reflect badly on a coach who's not really appreciated for his coaching ability but is there just for his marketability.
I think by the end of this window Mourinho will understand that his chances for a top 4 spot are minimal, his chances of taking an EL spot are also bad, his chances to win the Coppa are slim. So he'll try to focus this bunch of losers to the Conference League.