It is clear that David Luiz and Shkodran Mustafi aren’t good enough for Arsenal if they want to challenge for a Champions League spot, as the club finished way down in eighth.
Luiz alone has made two errors leading directly to goals and gave away five penalties - the most by any player in a campaign in Premier League history. If Mikel Arteta wants to bring a Pep Guardiola-esque style of play to the Emirates, there’s no question he needs to bring in a commanding ball-playing centre half.
Nathan Ake has already joined Guardiola this transfer window and Arsenal are running out of options on who to sign at the back.
Three potential targets: Kalidou Koulibaly, Samuel Umtiti, Dayot Upamecano