Stuttgart manager Bruno Labbadia believes the club's decision to cut the wage bill means keeping star defender Serdar Tasci is critical.
Budgets are being cut at the Mercedes-Benz Arena and Tasci could be among those heading for the exit amid reports of interest from Barcelona.
Labbadia admits he is worried about the 25-year-old Germany international leaving - not least because he is aware that the club do not have the resources to replace him.
"We already have a small competitive disadvantage regarding our main rivals in the league," Labbadia told kicker-Sportmagazin.
"Of course, we have to be aware and we have to ensure this disadvantage is not getting out of hand.
"I am very worried about Tasci, like I am worried about every player of my first-team squad.
"We would not possess the resources to sign a good replacement."
Tasci is a product of the Stuttgart youth system and has played nearly 200 games for the club. He has two years remaining on his contract with the Reds.