Sheffield Wednesday and Peterborough United are tied at 0-0 in a largely uneventful first half at Hillborough.
Dave Jones's side started brightly and fired early warning shots through Michail Antonio and Jay Bothroyd, neither of whom troubled Robert Olejnik.
The visitors were outplayed in the early stages, but they created an early opportunity when George Boyd's strike forced a save from Chris Kirkland.
The Owls continued to bombard Olejnik's goal, with Ross Barkley testing him on 13 minutes and Miguel Llera heading over from a corner moments later.
Both sides had a handful of efforts from range ahead of the half-time whistle, but neither were clinical enough to force an opening.
