Citti, Mattiello, Pol Garcia, Penna and Tavanti are all supposedly strong at this level.
I wouldn't worry about the result, U17 football is extremely frivolous and results swing all over the place. Inter beat Kashima 4-1 last year for example. The Japanese are technically strong and indefatigable, and that counts a lot at this level. You only have to look at the national U17 results to see this.
It's when players start to play in strong leagues that they really progress.