Benfica president Luis Filipe Vieira told Bernardo Silva that he would never play for the club again after a dispute over a month's unpaid wages.
According to a report in Ojogo, the player was still contractually linked to Benfica having moved on loan to Monaco.
But Vieira refused to accept Silva's request that the wage be paid by the Portuguese club, claiming that "the loan agreement states that Monaco are responsible for wages".
In a series of emails exchanged between the Benfica hierarchy, Vieira insisted that Silva would "not return to wear the shirt of the Benfica".
The Portugal international was eventually sold to Monaco, where he excelled and secured a lucrative transfer to Manchester City this summer.
"When you have a coach like Guardiola you cannot say no, because of the way he plays and the style his teams play," Silva told Sky Sports on his decision to join City.
"Also, the quality of players that Manchester City have, when you have the opportunity to play with David Silva, Kevin De Bruyne, Sergio Aguero, I could say all of them.
"To be trained by Guardiola and learn from the best, you cannot say no. All coaches have different ways of working. Of course, Guardiola is very different from [Leonardo] Jardim at Monaco, so I am learning different things.
"He always tries to get to the little details and I think that makes the difference. To know the way he wants to defend and attack, so when you get on the pitch you know everything you have to do.
"And then he also gives you the freedom to play and use your qualities. It's been a pleasure, I've learned a lot already and I hope I can learn much more."