The 17-year-old was given the chance to impress by Arsene Wenger having arrived from Lens earlier in 2015, and grabbed the opportunity to impress with both hands.
Arsene Wenger will be more guarded than most against lavishing premature praise on young prospects. For every Cesc Fabregas or Jack Wilshere, there is a Ryo Miyaichi or Arturo Lupoli.
But Wenger is all too aware of what a precocious talent he has brought to Arsenal in Jeff Reine-Adelaide.
"Reine-Adelaide is something special, you know," he told Arsenal Player after his cameo against Lyon in the Emirates Cup.