Lazio coach Maurizio Sarri is delighted working with Luka Romero.
The Argentine teen signed for Lazio this summer from Real Mallorca.
Sarri said, "I have never seen a 16 year old with this quality and determination.
"This is a boy who trains in a ferocious way, an attentive boy. He is an exception for his age.
"From a physical point of view he is still missing something, as he should be, during the season he is one of those players who can give us a hand."