Watching the game last night & also his performances in the Olympics, there are plenty of times in the game where he shifts position. Just occasionally last night swapping with Neymar but also playing on the other side. In the Olympics, he moved wide & stayed there & grafted like James Milner with ability, even dropping back to fullback at times, on the left.
Questions about how he fits in, are therefore pretty uneccessary as the answer is 'pretty much anywhere'. We are building an attack of devastating young players who can play more than one position. Sane, Jesus & Kelechi could easily swap around & Kelechi's original position is 10, not 9, & he has a different side we have not yet seen. Sane could drop deeper imo, from watching him in the kids' game. Sterling can play either side. Moreno has played right accross the front.
Then we have players like Roberts Diaz, Sancho etc coming through who could play different roles, attacking mids a few goalscorers & several wingers.
Ageuro, Silva, & everyone else have some serious competition in the near future imo.