The problem is that when he recovers from injury he is in a decline in form, which is normal because he has just returned to the pitch and what is even more worrying is that usually he is injured again shortly after he recovers.
It will be very difficult to return to his previous performance because he spends more time in the treatment room. I think this is because he himself lacks discipline in maintaining his fitness. because a player must be good at maintaining health on and off the field.
If it's a fact, things happen when a player hasn't played for a long time, he usually loses all his work, it's hard to get up to date because basically it's a huge effort to be able to be at the level, and even in any type of football, be it Spanish, German, Saudi league, it's hard to get in shape, although he has an advantage, that it's not the PL, where the physical condition is Extremely high, and that's what I like about the PL because it's very demanding, in part the talent that Ney has is good , it helps him get up to date, the main thing is that he finally recovers from that injury.