Keane rues poor defending
Clinton Morrison had Coventry 2-0 up midway through the first-half with an exquisite lob and a header, and while Jon Walters quickly pulled one back Ipswich were unable to find an equaliser.
Jaime Peters, Lee Martin and Walters were all denied by fine saves from Keiren Westwood in the Coventry goal and Keane cut a disconsolate figure at the final whistle.