Ferguson keeps faith with the same side that drew 2-2 with Charlton Athletic in midweek.
Ipswich boss Mick McCarthy has made four changes to his side that were beaten 1-0 by Nottingham Forest in midweek.
Richard Stearman and Lee Martin are suspended so are replaced in the lineup by Elliot Hewitt and Jay Tabb, while David McGoldrick and Frank Nouble start in place of Daryl Murphy and Michael Chopra in attack.
Peterborough United: Olejnik, Zakuani, Little, Bostwick, Swanson, McCann, Rowe , Payne, Mendez-Laing, Tomlin, Gayle
Ipswich Town: Henderson, Hewitt, Chambers, Smith, Cresswell, Drury, Hyam, N'Daw, Tabb, McGoldrick, Nouble