Joe Newell is fit again after a hand injury and the midfielder is expected to feature for the development squad next week in a friendly fixture.
Ferguson's side made it six wins from six matches as they swept aside Reading in the Capital One Cup on Tuesday night. The Posh boss made four changes for the second-round tie and admits those players that came into the team have given him food for thought.
"I have a difficult decision to make," said Ferguson. "The four players that came into the starting line-up did very well against Reading, but I know in my mind what I am going to do and the players will know on Friday."
Striker Emile Sinclair could make his Crawley debut against his former side just 24 hours after completing a £100,000 transfer from Peterborough.
Sinclair signed a two-year deal with the Reds and could be thrown straight into the starting line-up at London Road.
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- Darren Ferguson