Started out as LB at Ajax, but definitely better centrally. I'm a big fan of Martinez, really good on the ball, tenacious, winner's mentality, fast, great passing range. Premier League fans will whine about his height, but I think there are few CB's in the PL better than him. Ajax is bossing it in the CL with two CB's smaller than 1'80. Think he would cost around €40m, to be honest, extended his contract recently until 2025.
Arteta's definitely inherited the love of a new defender off Pep. He can't resist. Surely would mean Holding leaving if this one goes through.