Leyton Orient FA Cup hero Jonathan Tehoue has emerged as a doubt for Wednesday's replay at Arsenal.
The French striker, who climbed off the bench to grab a famous equaliser in the 1-1 draw at Brisbane Road last weekend, went home from training on Monday with a migraine.
"I'm struggling with one or two players," boss Russell Slade told Sky Sports News.
He added: "I'm sure he (Tehoue) will do everything in his power to be available, but we're not going there as strong as I would like."
Slade is awaiting the results of a scan on skipper Stephen Dawson's knee injury after the midfielder was stretchered off 19 minutes into Saturday's 2-2 draw at Huddersfield.
To add to his problems, Matt Spring and Jason Crowe are struggling with injuries and Harry Kane is suspended after his weekend red card.
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