Captain Andy Webster took a calf knock against Falkirk on Sunday so has not trained since and is unlikely to make it.
Darren Dods and Garry Kenneth also picked up injuries against the Bairns and have not trained either - but caretaker boss Peter Houston is hopeful they will play.
Definitely ruled out are Francisco Sandaza (groin), Lee Wilkie (knee), Danny Cadamarteri (calf) and Scott Robertson (groin).
United (from): Pernis, Dixon, Dods, Kenneth, Webster, Watson, Dillon, Kovacevic, Buaben, Gomis, D Robertson, Swanson, Conway, Shala, Myrie-Williams, Daly, Goodwillie, Casalinuovo, Banks.
