LaLiga president Javier Tebas has taken a fresh swipe at Manchester City.
City had their European ban overturned by the Court of Arbitration for Sport (CAS) this week.
"Manchester City will be in the Champions League next season not because they've done things well, but because CAS have done things badly," Tebas told ESPN.
"In fact, CAS have sanctioned them with 10 million euros, which won't be for nothing.
"I've read in the press that it's because they didn't collaborate with UEFA.
"Why is that? Have City hidden documentation?
"I'd like to see the final resolution, if I may.
"We still haven't been able to read CAS's final resolution from the PSG case, from CAS, which was a long time ago.
"The day that I read it, I will tell Guardiola what I'm convinced about: Manchester City have done nothing well.
"CAS isn't up to standard to give resolutions in the football industry.
"City... we all know what they do! Everyone in football knows what they do.
"In fact, when they got the [original] punishment, no one in European professional football was surprised. The opposite.
"I wouldn't say it was celebrated, but some said that it's just as well that some justice was done with clubs owned by states.
"Then, on the contrary, there were protests from [Jurgen] Klopp, [Jose] Mourinho after CAS's resolution [was published].
"Everyone knows that they try to flout Financial Fair Play.
"CAS is dead.
"Their resolutions have been generating doubts for many years.
"There's no transparency and often you see the judges they've named and you already know what their resolution will be.
"Switzerland has a lot of prestige in arbitration and CAS is doing it a disservice."
"There isn't anyone else that has spent more on signings in the last five years.
"Neymar is no longer in Spain because he was brought to another state owned club in exchange for a barbaric amount of money.
"City sign players with oil, everyone knows that, everyone in football. For many years.
"For the good of the industry, when someone breaks the rules, the sector can go into a crisis."