Yeah, I find it strange that some people already, based on what is pretty much one match, come to a conclusion that he is weak aerially. If you watch the Euros and watch Lyon matches, you'd see he has good jumping ability and positioning. Every player, no matter how good, has some matches where they lose duels. Pique, Mascherano, Umtiti. That's normal. Add the fact that it was his first start for a new club, and I don't think it's fair to conclude that he is weak aerially. I need more than a few incidents in one first start to make such judgement.