Ipswich defender Ibrahima Sonko is doubtful for the visit of Palace.
The 30-year-old was substituted during Tuesday's win over Portsmouth with a hamstring strain having already been suffering with an ankle injury.
Manager Paul Jewell will be disappointed to dismantle his defence having only conceded three goals in a current run of six matches unbeaten.
Jewell faces a choice between Ivar Ingimarsson and Damien Delaney, who replaced Sonko on Tuesday, to start against the Eagles should the Senegalese fail to make it.
Striker Jason Scotland is also doubtful having suffered a hamstring injury as well on Tuesday night.
Nathan Ellington, who is still in search of his first goal in an Ipswich shirt, is likely to replace him.
Crystal Palace midfielder Owen Garvan is pushing to return in time to face his old club.
Garvan, who made more than 150 appearances in six years at Portman Road, is back in training after a knee injury and will be checked over.
Three ex-Tractor Boys who definitely will be travelling are David Wright, Darren Ambrose and Lewis Price.
Wright should partner Ambrose in midfield while goalkeeper Price will be on the bench.
Boss Dougie Freedman has no new injury worries after his in-form side picked up back-to-back wins top move up to fifth.
Midfielder Alex Marrow is still building up his fitness after an ankle injury and full-back Lee Hills is a long-term absentee with a knee problem.