The Spanish giants said that the pitch was not in a condition worthy of a football match – similar complaints to those made by Arsenal last month when they went to the San Siro.
“[Barcelona] passed the matter over to Uefa delegate Mikalai Varabyov at the post-match meeting,” the Catalan club said in a statement on Thursday.
“Varabyov has included the complaint in his report and Uefa will demand an explanation from the Italian club.”
Pep Guardiola said: “In the end we adapt to everything … but it’s clear that this was a problem for the spectacle.”
