Mark Warburton fears star striker Clayton Donaldson will quit Brentford in the summer unless they get promoted.
The Bees hitman has hammered 13 goals in 27 games for the Bees, but is out of contract at the end of the season.
Donaldson has yet to be offered a new deal at Griffin Park, with both parties willing to wait until later in the year to iron out the forward's future.
However, boss Warburton admits the former Crewe frontman is likely to leave the League One leaders unless they secure a spot in the Championship.
He said: “Clayton is very happy here, but he’s approaching 30 and wants to play at the highest level possible.
“He has been a fantastic servant for the club and knows we want to keep him on board. He wants to have a shot at the Championship, ideally with Brentford.
“Hopefully we can go and achieve our aims because we want to be successful together.”
Owner Matthew Benham recently stated his intention to keep Brentford’s squad intact. And Warburton claims the Bees have yet to receive a single offer for any of their star names.
He added: “We’ve heard nothing. If we do we will notify the player because it’s the right thing to do.
“Every player has a price, but if any one leaves it will be on our terms and the money will be reinvested in the squad.”