I guess in "THEIR" case... It was the only way possible that they would be able to get a win like that by having so much little possible but it's still an example of a team winning with 20% or less possession in world football.
But onto the scrambled formations like 2 man defence and Ljepoje Wall for example... That's where T11 is indeed being unrealistic. I managed a 5-3 win tanking on Capelli Tigers using the Ljepoje Wall against a team who came 4th in the league that season.