The former Barcelona coach's close friend has opted not to respond to questions about a meeting with Adriano Galliani that supposedly took place
The 51-year-old worked as head of external relations at Barcelona during the legendary midfielder's spell in charge of the Catalans, and has a close relationship with the former Spain international.
A report in La Gazzetta dello Sport this week suggested that Milan CEO Adriano Galliani has met with Estiarte and Guardiola's brother Pere to talk about the ex-Barca coach's plans for the future, but he has remained coy on whether the meeting took place or not.
"Did I speak with Milan about Guardiola? It's not up to me to answer that question..." the 51-year-old said at the World Business Forum.
Milan released an official statement on Tuesday evening to deny the meeting, but rumours about the Rossoneri's interest in Guardiola continue to surface.
Estiarte also took the time to respond to Inter president Massimo Moratti's recent claims that Barcelona are a boring team.
"I admire Moratti and I was surprised that he said something like that. He can say that he doesn't like our style of play, but it's a bit disrespectful to say that Barcelona are boring."