Ricardo Rodriguez and Luiz Gustavo will not be able to negotiate cheaper transfer fees should they fail to trigger their respective release clauses by the end of June, the club's sporting director Klaus Allofs has said.
Rodriguez, 23, and Luiz Gustavo, 28, both have €25 million release clauses in their contracts at Wolfsburg and are widely expected to leave the Bundesliga side in the summer.
But neither have had their release clauses activated with a week remaining before July 1.
Switzerland international Rodriguez has been linked with Arsenal, and earlier this month the full-back said he expects to leave the club this summer, while Brazil international Luiz Gusatvo is reportedly interested in a move to China.
"We are on the alert and we are prepared," Wolfsburg sporting director Klaus Allofs told kicker. "They will not get cheaper, rather the opposite."
Allofs reiterated that Rodriguez had already "clearly told us he sees his future elsewhere," but warned the Switzerland international that the club will not necessarily be open to a sale.
"There is enough time to come to a decision during that period," Allofs said. "We'd need to internally discuss a transfer at a later date."
Meanwhile, kicker reports that Gustavo's agent Roger Wittmann is in China and suggested he could be negotiating a deal with Guangzhou Evergrande.