After a half of only four shots between the two teams, the second-half could hardly have stood in starker contrast – the chances free-flowing for both teams in the 10 minutes after the interval.
It was Ipswich, needing to win at that point, who came out for the second-half the stronger.
Only a brilliant diving block from Joe Sheridan denying Leon Ayinde six yards out, before Rio Oudnie-Morgan’s hooked rebound trickled wide of the far post; Noah Watson had it covered. A minute later, Watson was on hand to divert away a fizzing effort from Ayinde inside the box.
Up the other end Palace went and after Ipswich conceded a free-kick for handball, Justin Devenny whipped an outstanding direct effort – from fully 30 yards – firmly against the upright.
The chances kept flowing – and the next fell to Ipswich who, winning the ball high and engineering a three-on-two in front of goal, saw Ayinde denied by a spectacular one-handed save from Whitworth, who stood tall as the attacker bared down on goal before pushing his shot over.
It was a turning point, as moments later, Palace took the lead – a classic ‘route one’ goal. Whitworth’s goal kick picked up speed in the wind and was headed on by Umeh, setting Plange racing in on goal – and he placed an accurate finish across goal on his left foot.
The action did not let up, and Palace maybe ought to have been two to the good moments later, but Umeh was unable to fully wrap his foot around Raymond’s pull-back; the ball, admittedly, had bobbled up off the turf.
It was only then that either team could take a moment to breathe – and indeed, a goal to the good and needing just a draw to advance, Darren Powell’s team managed the remainder of the half well.
The closest Ipswich came was when Osman Foyo – who had scored twice against Palace in the reverse fixture – advanced on the box and bent an effort narrowly wide of the post, before Jokūbas Mažionis headed the subsequent corner onto the top of the bar.
The win saw the result of the other game prove irrelevant to Palace, who got the job done in tough conditions; a 1-0 win to top Group H and advance to the Premier League Cup Round of 16.
Palace: Whitworth (GK), Imray, Sheridan, Farquhar, Watson, Devenny, Ozoh (Reid, 61), Umeh, Raymond (Rodney, 74), Rak-Sakyi (Wells-Morrison, 23), Plange.
Subs not used: Izquierdo (GK), Mathurin.
Ipswich: Binns (GK), Jambang, Barbrook, Mazionis, O’Connor, Carr (Foyo, 62), Turner, Newbueze (Oudnie-Morgan, 41), Roberts, Ayinde, Buabo (Boatswain, 45).
Subs not used: Cullum (GK), Taylor.