In his words, the football star said; "I've never seen a 15-year-old so comfortable around the first team, it's insane.
I said to Max on the way back from pre-season tour, I couldn't get my head around it that he was going back to school.
He FaceTimed the other day and he had his school uniform on, and I was like 'Mate, you've just played in the Premier League a week ago, and now you're walking back through the school gates.
Even me as a 15-year-old, going into West Ham's first team dressing room, I would no way have been as confident as he was.
I would've been quiet in the corner. Unless someone spoke to me, I wouldn't have spoken to them, whereas I feel like now, Max especially, he's just so confident in himself and his ability."