Sergio Aguero was "stupid" to leave Atletico Madrid "through the back door" for Manchester City, according to Los Rojiblancos president Enrique Cerezo.
The Argentine striker joined City for €45m in the summer of 2011 after scoring 101 goals across five seasons in the Spanish capital after joining from hometown club Independiente for €22m.
"He (Aguero) has been the only player who left Atleti under a cloud, as he was stupid," Cerezo told Cadena Cope’s El Partidazo show.
"He arrived as a hero, and he left through the back door.”
There has been speculation that the 28-year-old striker has fallen out with new boss Pep Guardiola, fuelling speculation of a move away from England with Real Madrid and Inter Milan among the clubs reportedly interested.