Ipswich responded with a triple substitution but it was Mateta who provided the menace as he ran in behind again to meet Eze’s clipped pass. Only an outstretched glove from Muric denied Palace a second.
Both managers shuffled their packs soon thereafter and the game, albeit lacking nothing in passion, continued to ebb and flow in terms of chances.
Ipswich did pose a couple of problems as the game entered its final stages: Omari Hutchinson forced Henderson into a crucial punch, and Sam Morsy fired a swerving effort wide of the mark from 30 yards.
And in a season where Palace have seemingly had precious little luck so far, they deserved their slice of it on 86 minutes when Greaves’ header back across goal – from Conor Chaplin’s clever set-piece – hit the base of the post, bounced back off Nathan Broadhead and went behind.
Not always pretty, but frequently in control, Palace saw out three minutes of added time to end their troubles on the road and move up to 16th in the Premier League table.
Ipswich: Muric (GK), H. Clarke, O'Shea, Graves, Davis, Morsy, Cajuste (Taylor, 65), Burns (Broadhead, 65), Hutchinson, J. Clarke (Chaplin, 65), Delap (Al-Hamadi, 80).
Subs: Walton (GK), Johnson, Townsend, Phillips, Szmodics.
Palace: Henderson (GK), Muñoz, Chalobah (Richards, 81), Lacroix, Guéhi, Mitchell, Doucouré (Lerma, 45), Hughes, Sarr (Nketiah, 90), Mateta, Eze (Devenny, 76).
Subs: Turner (GK), Ward, Clyne, Kporha, Schlupp.
As It Happened