For previous clubs Onana wasn't particularly injury prone,he played 32/34 for Lille and 63/76 for Everton,was he always picked,suspensions ?
We must remember he's only 24,already nearly 30 caps for Belgium,about 150 appearances in top flight league football.
Against Leeds he was uncharacteristically lazy for some reason.In all of his other games,he's been a physical force.Noticeable when he came on for the impressive Lindelof,he brought extra drive and energy in the final.
A nice problem to have,a central trio of Kamara,Tielemans and Onana.Although a classic DM and best suited to that role

,Onana might prosper as the more forward of these,getting a physical presence into the box.