Peterborough boss Mark Cooper is waiting on the fitness of defender Gabriel Zakuani ahead of the visit of Swansea to London Road.
Zakuani had to be replaced during last weekend`s 2-2 draw with Middlesbrough with a groin injury and he is not expected to be passed fit to continue at right-back.
Utility man Charlie Lee replaced him against Gordon Strachan`s side but is struggling with a dead leg so Krystian Pearce may be drafted in.
New signings Ryan Bennett, Exodus Geohaghon and Scott Griffiths will complete an inexperienced back four.
Winger Chris Whelpdale missed out last Saturday with a groin strain and remains a doubt while Shaun Batt will be hoping for a start after coming on to score a stunning equaliser.
George Boyd will continue to don the captain`s armband under Cooper after scoring his 11th goal of the season against Boro.
Swansea manager Paulo Sousa will have to make a change to his defence.
The Swans, who were thrashed 3-0 at Newcastle last weekend, are already missing captain Garry Monk (calf) and will now be without Alan Tate.
The former Manchester United trainee picked up his fifth yellow card of the season in the defeat at St James' Park and will sit out the clash at London Road.
Spanish defender Albert Serran is likely to deputise for the City vice-captain, making his first appearance of the season.
Meanwhile, the Swans, who lost their 11-game unbeaten run last weekend, will definitely be without striker Stephen Dobbie, who has an ankle injury, while Mark Gower is also expected to miss out with a hamstring problem.
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