Ipswich lost ground on the Championship high-flyers after a dour 0-0 draw at home to lowly Wigan.
Wigan's Malky Mackay felt it was impossible to tell which team were fighting relegation after a 0-0 draw with Ipswich.
Joao Teixeira scored twice as Brighton beat in-form Ipswich 3-2 in their Championship clash at the Amex Stadium.
Mick McCarthy admitted Ipswich were not at their best after they missed the chance to go top of the Championship.
Ipswich midfielder Kevin Bru has signed a new three-year contract.
Colchester have signed Jack Marriott on loan from Ipswich until the end of the season.
Ipswich have signed veteran goalkeeper Paddy Kenny from Bolton on a four-month contract.
Noel Hunt's double helped Ipswich climb back into the Championship automatic promotion places with a 3-1 win over Millwall.
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