Dundee United manager Jackie McNamara is running the rule over four potential signings on Monday.
Dundee United have assistant boss Paul Hegarty had no excuses for the defence after the 4-3 reverse to St Mirren.
Dundee United defender Sean Dillon has signed a two-year contract extension that will keep him at the club until 2015.
Dundee United are hopeful Sean Dillon could return from injury in time for their next SPL encounter against Aberdeen.
Rangers made it five wins from five following a convincing 4-0 success over Dundee United.