Very poor in the air, which is a problem that won’t just go away, although he was top notch tonight.
that is a concern, I wouldn't say he's totally terrible though, he just mistimes his headers but he likes to head the ball so it's not that bad imo, hopefully there is still an improvement in that regard otherwise he should be working on his concentration, if he's switched on 95minutes per match he will be a beast, everything concerning defending on the ground he's very strong and brave, just needs to build on that.
Regarding his lack of aerial ability, think he should be paired with someone who has that ability, unfortunately we are short of these players if I don't count Smalling, we should get someone, think Maguire would be great but anyways if we don't get to sit too deep and invite every average team to put in the crosses, that will also get better not only with a new manager but better fullbacks hopefully coming soon and we will attack more, then Bailly is a great player to cover the ground and sweep around