The agent even spared some barbs for Txiiki Begiristain, technical director at Manchester City, and Ferran Soriano, City's chief executive - both of whom used to work for the Catalan club - saying Toure "opened the door" for others to follow him from Barcelona.
"He [Toure] was not afraid. But now everybody from Barca comes to City."
Former Barcelona manager Guardiola oversaw Toure's departure from Camp Nou in 2010, sanctioning City's £24million transfer after the Ivory Coast international lost his place in the starting XI to Sergio Busquets.
This frustration may well fuel Seluk's combustible comments, but the agent has plenty of previous - and not just with Pep Guardiola.
Seluk was giving out to Manchester City long before Toure actually joined the club. When specualtion about the player's Camp Nou departure first arose, Seluk said: "If Yaya leaves Barcelona, he won’t go to Manchester City, he’ll sign for a club that’s much more important."
If that were not painful enough, Seluk really put his foot in it once negotiations had progressed further with a number of clubs.
"City talk a lot," Seluk said, "but afterwards when they put their offer in writing, they don’t look like a rich club, but a bankrupt one."
Perhaps the biggest farce came just two seasons ago, when Toure was apparently on the verge of leaving Manchester when the club forgot his birthday. Seluk had some choice words on that occasion, too.
"The club’s owners ate a 100kg cake after winning the Premier League this season," he said, "but when they and the players were all together, none of them shook his hand on his birthday.
"It shows they don’t care about him."
However, Toure himself said of his agent in 2009: "This guy says one thing one day and says another thing on the other," so it remains to be seen how set the player really is on heading for pastures new this summer.
Pep Guardiola timeline
- Telegraph