Celtic’s hopes of signing Austrian goalkeeper Nikolas Polster may have suffered a setback, with fresh reports suggesting Wolfsberger are now confident of tying him down to a new contract. Polster has represented Austria at Under-21 level and enhanced his reputation during another impressive campaign with Wolfsberger. With just 12 months remaining on his current deal, there had been growing expectation that this summer represented Wolfsberger’s best opportunity to cash in. If that happens, it would significantly strengthen the Austrian club’s position and make any potential transfer considerably more difficult. The Scottish champions have been linked with several shot-stoppers this summer, so there is nothing to suggest Polster is the club’s only option.