Ipswich's winless run continued as they laboured to a goalless draw with Stoke at the Bet365 Stadium, where Jordan Thompson was sent off.
The hosts were reduced to 10 men midway through the second half when Thompson was dismissed after picking up a second yellow card, seemingly for something he said after being fouled by Conor Chaplin.
Second-placed Ipswich are now without a win in five matches and have scored only once in their past four games.
Stoke, meanwhile, remain unbeaten under Steven Schumacher, having won one and drawn three of their four matches since he took over.