Winger Cox missed Tuesday night's 2-2 draw at Brentford with a thigh injury but boss Russell Slade is hopeful he will be fit.
Defender Scott Cuthbert was also absent at Griffin Park having only recently got back to fitness following a long-term hamstring injury, so he could return.
Fellow centre-half and club captain Nathan Clarke was able to join in the warm-up on Tuesday night and is nearing a return after two months out with an ankle injury.
But striker Kevin Lisbie looks set to miss out again with the hamstring injury which has kept him on the sidelines for the last four matches.
- Sports & Recreation
- Russell Slade