It looked at Christmas like these two clubs could be two divisions apart next season, but Birmingham have since accrued 13 points to boost their survival hopes no-end.
Huddersfield, though, have slipped into the Premier League’s bottom three after losing each of their last five.
The visitors are 39/20 (2.95) to show their top flight pedigree, having beaten their opponents in this competition as a League One club back in 2008.
A draw, which has occurred in three of the last five meetings between these sides, is 21/10 (3.1) .
Collin Quaner might be given the nod and is 57/20 (3.85) to bag anytime, but left-back Chris Loewe is still injured while midfielder Danny Williams is a doubt.
Fringe player Lukasz Jutkiewicz will look to take his chance and is 51/20 (3.55) to score, but Isaac Vassell is a long-term absentee while Jacques Maghoma is a doubt.
Blues to lead at the break and win
Huddersfield have trailed at half-time on eight occasions this season in both league and cup, and only once have they attained so much as a draw.
By contrast, Birmingham have led at the interval in each of their last two games and both have ended in a 3-1 victory. They are 3/1 (4.0) to capitalize on a half-time advantage once again.
Tips and predictions
Whilst there is value in backing the Blues to win this one, the Birmingham Draw No Bet at 4/5 (1.8) gives us some insurance.
This will land if the home side are victorious, with the stake returned if the match ends in a draw after 90 minutes.Birmingham Draw No Bet 4/5 (1.8) with SportPesa