Head coach Wouter Vrancken admits Claudio Braga has spoken to him about his future but is confident Hearts' star striker will remain "100% committed" for "as long as he's here".
Vrancken insisted what was said between him and last season's PFA Scotland player of the year will remain confidential and added the Portuguese striker is "staying at the moment".
Braga has been linked with a move away - following the departures of Lawrence Shankland, Cammy Devlin and Alexandros Kyziridis - but the Belgian coach is not aware of any "concrete" bids.
"I think he's staying at the moment. I'm happy when I don't hear anything! Let's hope at the beginning of September it's still like this," said Vrancken.
"Claudio and me are open with each other and the most important thing is Claudio as a personality; as long as he's here he will be 100% committed - like you saw in the last games."
Wrancken is pragmatic about the fluidity of the transfer market while being certain Hearts are prepared to fill the vacancy should Braga or another key player leave.
"It's the world of football, you have to cope and know how transfer windows can be. It's responsible for us as a club to be ready when something happens," he added.
"He's a good player and it's a transfer window so you're always a little bit nervous if he stays or not."