Late test for Fallon
Crawley will check on Rory Fallon ahead of the visit of leaders Wolves.
The New Zealand striker missed Saturday's 1-0 win over Colchester with a heel problem.
Boss John Gregory has no new injury concerns following the weekend while midfielder Andy Drury overcame a slight groin strain to face the U's and should be available again.
Gregory has been rotating his squad with his side facing a fixture backlog so the likes of Gary Dicker, Jamie Proctor and Sergio Torres will come into the reckoning for places in the starting line-up.
Sam Ricketts will return from injury as Wolves aim to get back to winning ways.
The experienced defender missed the goalless draw with rivals Shrewsbury with a slight quad strain but trained on Monday and is fit for the midweek clash.
Kenny Jackett has no new injury concerns but could decide to freshen his side up, which could mean starts for Leon Clarke and Matt Doherty.
Saturday's stalemate ended Wolves' nine-match winning run and allowed Brentford to close the gap at the top to just one point.