Messi, Luis Suarez, Busquets, Piqué, Rakitic, Jordi Alba ... some of the huge footballers who have determined Barcelona's success over the last decade, but they don't have long left.
The players who are the backbone of the Catalan squad are pushing - or exceeding - 30 and are edging closer and closer to their exit from the beautiful game, or perhaps a downturn in form.
We have probably already seen 100 of their best matches, and the club has been aware for a while that it needs to renew the foundations of the squad.
Barcelona have, for that reason, been hedging their bets for young talents in the recent transfer markets, for all areas of the pitch.
The management know, above anyone, that renewing the team is the way forward in order to continue winning each season in the long run.