The striker was sidelined for Saturday's FA Cup quarter-final against Bolton with a hamstring injury.
"Ade's struggling," said Harry at Tuesday's pre-Stoke media briefing. "He's not quite right and has to be doubtful.
"Aaron Lennon isn't ready to play yet with his hamstring problem either, but it's improving.
"Other than that, we're pretty much okay."
Michael Dawson and Tom Huddlestone remain out longer-term.