Both teams have had their last two matches postponed, meaning they will be in action for the first time since December 11.
Coventry are winless in their last five games, but four of those have been draws; including a 1-1 tie against Huddersfield Town last time out.
Matt Godden scored a 93rd-minute equaliser at the John Smith’s Stadium, no less than the Sky Blues deserved after they enjoyed 65% of the possession and had 12 shots on target.
Mark Robins’s side are currently two points behind the playoffs, but with two games in hand over the sixth-place Terriers.
Coventry won their first six home league matches of the campaign, but have now picked up just one victory in their last five games at the CBS Arena.
Millwall were beaten 6-1 in this fixture on the final day of last season and have won just two of their 11 away league matches in 2021-22.
Gary Rowett lamented a “hugely disappointing afternoon” as the Lions lost 2-1 away at Peterborough United last time out.
The South London outfit have now won just one of their last six matches to slip away from playoff contention.
These two sides played out a 1-1 draw at The Den earlier in the season, with first half goals from Viktor Gyokeres and George Saville.