Struggling sportswear group JJB Sports has warned it could go bust unless landlords agree to cut rents on 95 stores it has earmarked for possible closure.JJB's plan comes just two years after it did a similar deal, called a company voluntary agreement or CVA, on 140 stores.The voluntary agreement will be accompanied by a further fund raising on top of a planned £31.5m placing agreed with its major shareholders. If either plan falters, the firm warned its future is in doubt.Under the proposals, 45 stores will definitely shut, while another 50 stores are up for review. A core of 150 core stores will be retained and form the base of the firm's revival plan, though unless its landlords agree, JJB says it may not survive. "In light of the review and having considered a number of restructuring options available, the group's future viability is dependent upon the successful implementation of a company voluntary arrangement ("CVA") involving the compromise and release of certain liabilities owed by the group to its landlords," it said. JJB wants to reduce the rents and pay them on a monthly rather than quarterly basis for the next two years. "The board and management team are working urgently on a fundamental restructuring plan which will significantly strengthen JJB's finances and build on the Group's strengths. We are confident that, with the support of our key stakeholders, we can complete this restructuring in the coming weeks," chairman Mike McTighe said.Earlier this month, sports leisure retailer JD Sports revealed it had made a bid approach to JJB, though talks were said to be at a very early stage.