Liverpool has, in recent years, been a steady stream of very good players going to Barcelona, to the great anguish of local supporters.
Javier Mascherano got his move in 2010 after going on strike for Roy Hodgson, Luis Suarez was persuaded to turn down Arsenal in the expectation that he'd earn a long-yearned move to the Camp Nou in 2014, and most recently Phillippe Coutinho got his move to Spain, albeit a few months later than he hoped.
The Coutinho move has reportedly caused Liverpool to take action against history repeating itself again, with Catal outlet SER reporting that a clause in Coutinho's contract forbids Barca signing a player from Liverpool for three seasons.
The deal netted Liverpool €160 million, and they arguably didn't miss the Brazilian playmaker until the Champions League final, as they toiled with the equilibrium of their attack upset by the injury to Mo Salah.
It's not the first club-specific clause Liverpool have put in a contract. Two years ago, working with Football Leaks, Belgian newspaper Le Soir has revealed that prospective bidders will have to fork out a whopping €98m (£82.3m) to trigger negotiations with Liverpool.
However, there's a catch.
That prospective bidder can't be Arsenal.