Talent until 22-23 is no longer anywhere in professional football, regardless of what the super "experts" of the leaflets and every charlatan analyze. Whoever has a contact with the infrastructure departments and the coaches, understands five things. first serious (not in financial terms, but in terms) professional contract (for a child from academia, usually 17-18), the player is considered ready regularly and in general physical condition for first team. What is missing of course in this ages, it is the experience, which of course comes with the games, the performances, etc. Of course, because these are still children, and not adult adults, in serious football clubs, there is constant monitoring of the player's behavior and development, until it reaches the level of a serious professional (model professional as the English say). Now, what all this happens to Greek footballers and the way teams work, this is a another issue.
As far as Nini is concerned, the player certainly burned down at Panathinaikos and its bad management, due to the non-existent, human resources of the team (another achievement of the family). After appearing for the first time in mid-January, , did not make summer preparations the following year and showed the problem in the abdomen, where it was not treated at all seriously. of Nini, was done by Ten Cate, changing his position and improving him a lot. From there and beyond, he chose after the year of the double, to leave for Italy.
And to understand, how big the environment is and the way the players are managed in a team, Nini's almost interlocutor, Kyriakos Papadopoulos, was lucky enough to get a transfer without having spent many years with Olympiakos, he stayed in Magath's hands, improved him and brought him to the level he is.