The Serie A side left Spain empty-handed following goals from Rafinha and Jordi Alba midweek, much to the forward's frustration
Mauro Icardi said Inter were not up to their own standard as he lamented the club's Champions League defeat to Barcelona in the absence of Lionel Messi.
Messi watched from the stands as his Barca team-mates earned a 2-0 Group B victory over Italian visitors Inter at Camp Nou on Wednesday.
Icardi and Inter were looking to take advantage of Messi's absence, with the Barca captain and five-time Ballon d'Or winner sidelined due to a fractured arm.