Troubled retailer JJB Sports extended its losses in 2010 and said turning the company around would take up to five years.The firm made a pre-tax loss of £181.4m on revenues of £362.9m in the 52 weeks to the end of January 2011.This was more than double the £68.6m loss that JJB posted in the previous 12 months.Chairman Mike McTighe said that a great deal had happened at the firm since the period end."We have delivered two further fundraisings and agreed a significant [company voluntary agreement] with our landlords that gives the company a real chance of recovery," he said."However, this is the beginning of the hard work and not the end," he added. "The restructuring of JJB will not be easy or quick and will most likely take three to five years."JJB almost fell into administration in 2010 and was only saved by a £96.5m injection of funds from shareholders, which include a foundation set up by Microsoft founder Bill Gates.McTighe said business performance in the first quarter had met the board's expectations despite the sales environment remaining challenging.He also confirmed planned financial restructuring was completed on schedule by the end of April and operational restructuring had progressed well. JJB has closed underperforming stores as part of its CVA, and headcount and operating costs have been significantly reduced, the firm said.It was also pushing on with plans to refurbish 150 stores over the rest of 2011, with a further 50 targeted for 2012/13.