Hamilton manager Billy Reid has a full squad to choose from.
Skipper Alex Neil played 45 minutes of a midweek friendly against Dumbarton following his comeback from a summer hip injury off the bench at Motherwell last weekend.
The midfielder will not start against United but he is expected to come off the bench again.
Midfielder Danny Swanson is out for Dundee United with a facial injury.
Swanson was allegedly involved in an incident in Glasgow city centre in the early hours of Wednesday morning.
David Goodwillie and Barry Douglas will be in the 18-man squad but may not start after incurring the wrath of manager Peter Houston for being present at the same incident as Swanson, while Craig Conway, Scott Severin, Darren Dods and Mihael Kovacevic are all doubtful.
Hamilton (from): Cerny, Buchanan, Canning, Neil, McLaughlin, McDonald, M Paixao, Goodwin, Mensing, Routledge, Imrie, F Paixao, Hasselbaink, Casalinuovo, Murdoch, Elebert, Skelton, Gillespie.
United (from): Pernis, Dillon, Watson, Kenneth, Severin, Dixon, Douglas, Gomis, D Robertson, S Robertson, Buaben, Conway, Goodwillie, Daly, Cadamarteri, Shala, Russell, Hill, Dow, Banks, Kovacevic.