The 17-year-old could make his first senior appearance in a competitive game for the Turkish national team.
Ünal has been closely linked with Chelsea over the last season.
Bursaspor head of youth Necmettin Kocaman recently told Radyospor, “Chelsea have made an offer for Enes, however, we hope he will play for our senior team before making such a move.”
Ünal has an extraordinary international record, hitting the back of the net 24 times in 25 games for the U16’s and has already been called-up to the U19 as well as the U21 sides.
The 17-year-old striker became the youngest player ever to score in the Süper Lig last season and already has six first team goals for the Green Crocodiles.
The striker was recently listed in the Guardian as one of the 40 best young talents in world football.