The skipper has had stomach cramps but Martin said: "It's a bit of a problem, Ledley's had a virus but hopefully he'll be okay for Saturday. Obviously he's our skipper and an important player for us."
On the plus side, Martin confirmed that Jermaine Jenas will be back in the squad following the calf problem that kept him out of the last three games against Blackburn, Bayer Leverkusen and Wigan.
Otherwise, Paul Stalteri, Anthony Gardner (both knee) and Mido (groin) remain out injured and Hossam Ghaly suspended.
"Paul Stalteri is coming back but he's not ready for selection yet," added Martin. "Mido has a little tear on his groin, he will start a running programme and return to training next week and Anthony Gardner should return to full training next week."
Martin Jol reports that Ledley King has been suffering from a virus this week - but says he should be fit to face Arsenal on Saturday.