Luiz is an international DM with an Olympic Gold Medal.
He's also a fantastic footballer who is young and has plenty of scope for improvement.
No idea why you'd want to swap him with another unproven foreign player who would have to go through all that settling in period again.
I don't rate him as a DM.
I think he's wasted there and would be better that bit further forward as a CM.
I don't think he's mature enough to handle the responsibility that being a DM brings.
He's not that tall, about 5'8", so isn't particularly good in the air.
He's iffy in challenges, sometimes not making a challenge at all.
He'd probably be better suited to playing in Spain.
Zaharia is a dedicated DM.
He offers coverage at right back and both centreback spots.
He's 6' and reasonably good in the air.
He loves a challenge and reads a game well.
He's played most of his career in a league that's about as competitive as the prem.
He'd offer the advantage of not being called away for tournaments in Africa or South America.
If you don't like the idea of Zakaria, who would you suggest to improve the team in the DM spots.