Neco Williams struck in the 13th minute at Portman Road on Friday night.
The match kicked off at 8pm UK time in front of a packed Portman Road.
Daniel Munoz crossed from the right. Williams controlled it and guided it home.
Walton saved an acrobatic Cunha effort before Fatawu fired off target for Ipswich.
Enciso and Philogene both forced saves as the hosts chased an equaliser.
Tenth with nine points, Ipswich are chasing a place near the top six.
Nineteenth and on three straight defeats, Forest are fighting to leave the bottom three.
The Forest captain returned from injury. Ex-Ipswich man Delap leads the attack.
Forest have won 41 of 83 meetings and took a 4-2 win here in March 2025.
A Forest win would lift them out of the relegation zone tonight.
A comeback keeps Ipswich's dream season alive. Defeat stalls their momentum.
Tap below for what happened, why it matters and what happens next.
Get the full breakdown, key numbers, and what happens next.
Read on Rive News