The 19-year-old Frenchman, who came through the ranks at Lens before making a £1.75million move to north London, has made a handful of appearances for Arsenal since signing for the club back in 2015.
Arsene Wenger has used the midfielder sparingly, utilising him in both the EFL Cup and FA Cup, which the Gunners went on to win against Chelsea.
Despite still being a teenager, Reine-Adelaide is both tall and physically commanding – capable of dealing with the strains of the Premier League.
And fellow Frenchman and Gunners teammate Koscielny believes he may just be ready to take the leap and become a first team regular next season.
“I hope it’s Jeff Reine-Adelaide,” Koscielny told Arsenal Player. “He’s a young boy but I think he has a lot of quality.
“He plays some games every season and I think he can improve a lot.
“He can learn a lot with us. He has all the quality and after that it’s in his head to work more and to want to achieve something with this club
“I hope he will start next season, play a lot and improve with us.”