19-year-old Ryan Nolan made his senior for Inter Milan on Saturday night as they beat Swiss side Lugano 3-0 in a pre-season friendly.
Nolan, who was born in Clare but moved to Spain with his family as a child, came off the bench to replace Stefan de Vrij with 15 minutes left in last night's game.
"I moved to Spain when I was eight and that's where I developed as a footballer," Nolan told the Inter Milan YouTube channel last year.
The Shannon native moved to Inter Milan three years ago. He had been playing with Torre-Pacheco in Murcia.
The centre-back has been training with the Inter senior team throughout the pre-season.
"He's good in the air and his determination is certainly his main strength," said Inter youth coach Stefan Vecchi last year.
"He stays very switched on and he's determined and aggressive - those are his strengths. He's made real progress because he's so keen to improve."
Nolan is the third Irish player to feature for Inter, following in the footsteps of Liam Brady and Robbie Keane.