Swiss focus on Fed's fitness

Davis Cup hopes hinge on star's nagging back

Switzerland's hopes of a first ever Davis Cup win lay in the balance on Monday as the team awaited word on just how badly Roger Federer had injured his back ahead of this week's final against France in Lille.

The 17-time Grand Slam winner shocked thousands of fans and his opponent Novak Djokovic in London on Sunday evening when he withdrew from the final of the season-ending World Tour Championship, saying he was not match fit.