samthegooner midfield first and foremost, we have a defensive physical specimen in Rice and Odegaard but no one who can link defence and attacking play regularly. Partey used to be great for that but neither should he be relied upon fitness wise nor should he be in there anyway.
Havertz as a CM is something I could see back in 019 but Chelsea and dare I say it Arteta coached all of his midfielder attributes out of him. We also need a Saka backup much more urgently than any addition in our backline but whoever comes in would have to have a gun to Mikel's head to get him to bench Saka from time to time anyway.