Arsene Wenger was satisfied with the way Arsenal competed against Southampton on Tuesday night, despite falling to a narrow defeat.
A young Gunners team took an early lead through Alexis Sanchez's stunning free-kick but were quickly pegged back by Dusan Tadic's penalty and Nathaniel Clyne's long-range effort.
Wenger's side fought back courageously in the second half but couldn't find an equaliser and the manager felt his side lacked some experience during the decisive moments of the tie.
"Overall we lacked a little bit of experience in the decisive moments of the game"
"Overall the combative aspect of the team was great - we gave everything," Wenger told Arsenal Player.
"I felt that we did the most important thing and that was to be 1-0 up. After that we were a bit fragile defensively and too deep.
"In the second half we rectified it and played high up. Overall we lacked a little bit of experience in the decisive moments of the game.
"But my regret is the way we conceded the two goals and the fact that we gave a lot in the second half and couldn't score."