Benfica President Luis Felipe Vieira warned clubs including Juventus and Manchester United that they aim to “soon increase Joao Felix’s release clause.”
The 19-year-old has attracted attention from Europe’s top teams, with Real Madrid and Barcelona also contenders for his signature.
It’s reported there is a €100m release clause in his current contract, which runs to June 2023.
“There is only one thing for sure about Joao Felix: he is one of the best talents to come out of Portuguese football since Cristiano Ronaldo,” Benfica President Vieira told Tuttosport.
“At this moment in time, we have no intention of selling him. In fact, we will soon increase Joao Felix’s release clause.
“He has extraordinary technique, pace and also intelligence. He’s a good person with strong values, so that also makes me very proud.”
There are rumours the clause will be doubled to around €200m.
Juventus have also been linked with Benfica defender Ruben Dias, but again Vieira slammed the door.
“This is not the time, nor the place to talk about it. We’ll see in future, but Ruben is 21 years old and already one of the best in the world for his role. He’ll have a marvellous career and I like to think he’ll become our captain over the next few years.”