Arsenal boss Arsene Wenger must include a teenage goalkeeper on his bench for their Champions League tie at Anderlecht.
Wojciech Szczesny is suspended after being sent off against Galatasaray and David Ospina injured.
Damián Martínez, 22, will be making his European debut for Arsenal on the night, with Ryan Huddart or Josh Vickers to take their place on the bench as backup.
Huddart is an England Under-17 international and has played regularly for Arsenal's Under-18 team since being signed from Charlton Athletic. Vickers has the senior experience of playing on loan last season for Canvey Island in the Ryman Premier League.
