David Ospina will start for Arsenal in the Europa League against Ostersunds and again in the Carabao Cup final at Wembley three days later.
Arsene Wenger confirmed he will honour his promise to Ospina despite the proximity of the games.
The Colombian goalkeeper plays in all cup competitions when available and Petr Cech plays in the Premier League.
'It is always difficult decision,' said Wenger. 'But we have been clear since the start of the season that he plays in the whole competition.