Roma goalkeeper Wojciech Szczesny said the Italians "played against a team from another planet" after Barcelona romped to a 6-1 Champions League win.
Szczesny watched helplessly as Lionel Messi and Luis Suarez scored braces in a Barca masterclass on Tuesday.
Speaking to BT Sport afterwards, Szczesny admitted: "It was beautiful to watch because we played against a team from another planet.
"I was in goal playing for Roma but I appreciated what I saw from Barcelona. They were ridiculously good. As hard as it is to lose 6-1 it was beautiful to watch."
Despite the crushing defeat at the European champions, Roma remain second in Group E, level on points with third-placed Bayer Leverkusen heading into the final matchday.