The Brazilian has spent the last two years on loan with the Turkish side and his impressive showings have drawn interest from around Europe.
Liverpool were also linked with a move for Talisca during the winter window, and it now seems as though Jurgen Klopp's side may have locked down a deal for the emerging star to join the club this summer.
"Talisca was already gone at the winter break," Gunes said after their last game of the season against Sivasspor, in which they won 5-1 with Talisca on the scoresheet. "I'm sorry that he won't be with us any longer. I wish he could stay for his sake and ours. He already had a deal in place."
Gunes then hinted that the Premier League outfit would be his landing spot, alluding to Talisca being a rival for Everton star and former Besiktas forward Cenk Tosun.
"He might be rivals with Cenk Tosun," the manager said.
Rumours have also linked Talisca to Manchester United in recent days, and exactly what Gunes means by "rivals" is up for debate.
If Liverpool have already locked up a deal for Talisca, he will be joined in their summer signing class by Naby Keita, who last August signed a club-record £48 million ($65m) deal to move to Anfield this summer.