Boss Steve Evans admitted his Rotherham side were not at their best after playing out a 0-0 draw at Colchester.
Rotherham failed to score for the first time in the calendar year following a 0-0 draw with struggling Colchester.
Sanchez Watt continues his suspension as Colchester play host to fellow strugglers Sheffield United.
Gillingham boss Peter Taylor was furious Colchester's first goal was allowed to stand in their 3-0 defeat.
Colchester boss Joe Dunne reserved special praise for veteran striker Clinton Morrison who was called upon at the 11th hour and found the net in his side's
Sanchez Watt and veteran striker Clinton Morrison scored rare goals to help Colchester to a well-earned 3-0 victory over Gillingham.
Colchester are not expected to have any new injury or suspension concerns for the visit of Gillingham.
Boss Joe Dunne must decide whether to change his starting XI for the first time in four games as Colchester make the trip to MK Dons on New Year's Day.
Colchester assistant-boss Mark Kinsella was at a loss to explain his side's poor show as they were thrashed 4-0 at home by lowly Notts County.
Notts County player-boss Shaun Derry praised his free-scoring side after they thrashed Colchester 4-0 to move off the bottom of the table.
Notts County thrashed Colchester 4-0 to register back-to-back wins under Shaun Derry in emphatic style.
Colchester boss Joe Dunne described his side's performance in the defeat at Tranmere as 'unacceptable.'
Tranmere boss Ronnie Moore believes striker Ryan Lowe is playing like a man almost half his age after the 35-year-old's double helped Rovers defeat Colchester 2
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