Arsenal goalkeeper Bernd Leno believes Gabriel Martinelli has the quality and talent to become a world class player in the long run.
The teenager joined the Gunners from Brazilian fourth-tier side Ituano last summer and he was initially fancied to link up with the development squad.
However, he managed to sufficiently impress during the pre-season tour of the United States and was therefore able to cement a first-team spot under then-manager Unai Emery.
Martinelli scored a brace in his full debut against Nottingham Forest in the League Cup third round and he has since bagged another eight goals and four assists from 25 appearances.