Mark Warburton's Glasgow Rangers have struggled for goals this season.
Mark Warburton's Glasgow Rangers side are preparing for their Scottish League Cup last 16 tie at Ibrox.
The former Rangers man believes Mark Warburton's side can challenge Celtic.
Mark Warburton has already brought veteran Clint Hill to Ibrox this summer.
Mark Warburton's men can now turn their attention to their first season back in the top flight.