Calum Butcher is available for Millwall after missing Tuesday's league win over Port Vale.
Midfielder Ben Thompson and forward Lee Gregory are both rated as 50-50.
Goal-shy Leicester have problems up front as record signing Islam Slimani, who has six goals in 18 games, misses the trip with a groin problem.
Leonardo Ulloa is also likely to be unavailable due to a thigh injury as manager Claudio Ranieri prepares to make wholesale changes.
MOTD COMMENTATOR'S NOTES
Guy Mowbray: "The last time Millwall faced the previous season's Premier League champions was in the 2004 FA Cup final.