The Cameroon international begins a four-game ban which will stretch into next season after being sent-off for the second time this season for a stamp on Robbie Blake at Turf Moor.
Coppell must choose whether to go with youngster Alex Pearce alongside Michael Duberry or switch Kalifa Cisse from his usual midfield role to centre-back.
Top scorer Kevin Doyle could also miss out after he picked up an Achilles problem in the weekend's first leg so Dave Kitson is on standby to start.
Former Burnley winger Glen Little is available after recovering from a hamstring problem and he could feature.
However James Harper (groin), Chris Armstrong (knee) and Leroy Lita (foot) are all out but could be fit for the final should the Royals end their eight-game winless run at home and overturn a 1-0 deficit.
Burnley manager Owen Coyle is hoping that a trio of players will be passed fit.
Winger Wade Elliott missed Saturday's 1-0 win over the Royals due to a leg injury sustained in the final-day victory over Bristol City.
Joey Gudjonsson took Elliott's place against Reading but he was the victim of a heavy challenge by Michael Duberry and was substituted midway through the first half.
The other concern for Coyle is playmaker Chris Eagles, who jarred his hip on Saturday and was replaced in the second half.
All three men will be assessed as the Clarets seek to book their place in the play-off final at Wembley on May 25.
Sporting Life