Ipswich missed the chance to return to the top of the Championship as they were held to a goalless draw by Watford at Portman Road.
Kieran McKenna's side extended their unbeaten home record to 19 games and move up to second, a point ahead of Leeds, but will rue missing a glut of chances in the first half.
Nathan Broadhead hit the inside of the post while Kieffer Moore was superbly denied by Hornets keeper Daniel Bachmann and fired another good chance wide.
Watford improved vastly after the break and almost won it at the end but are now five games unbeaten under interim boss Tom Cleverley.