Porto coach Sergio Conceicao has hinted at hopes they can keep hold of Marko Grujic.
The on-loan Liverpool midfielder was outstanding for victory over Nacional on Sunday.
Conceicao enthused: "Grujic is in an excellent form and we have other quality midfielders, such as Sérgio Oliveira, Loum, Romário Baldé, Otávio and Fábio Vieira. He had his adaptation period and gave a very positive response in the last month, we are very happy with him."
On signing Grujic permanently, he added: "These are situations about preparing for the next season and, frankly, I'm not in the mood to answer in a real way.
"So I'm not going to say anything."
