Havertz; "I played every offensive position at Leverkusen. I played as a right-winger, number 10, a six, an eight, sometimes as a striker as well. For me, it’s important to have that flexibility on the pitch. I can play in many positions but, for me my best position is as a number 10 although to be honest I’m happy as long as I am on the pitch.”
https://www.thechelseachronicle.com/club-news/kai-havertz-flexible-but-considers-number-10-his-best-position/