If 3 years ago someone had said to me that Arsenal are going to sign Kai Havertz, when I was watching him then for Leverkusen and thinking "my god, this guy could be anything he wants to be," I'd have been over the moon.
He's so, so talented, and players like him, with such high football IQ, don't usually really come into their own until their mid-20s. Arteta will find the perfect role for him and help develop his game, and the kid will do very good things for us, I'm sure. Exciting!