Valerien Ismael said that it was a “lack of quality in the final third” that cost West Brom in their 1-1 draw with Middlesbrough before the international break.
Grady Diangana netted a second-half equaliser against Boro as the Baggies struggled with the absences of key players.
An inconsistent run of form – they have not won back-to-back games since the end of September – has seen them lose pace with Bournemouth and Fulham ahead of them.
While they remain unbeaten at home, West Brom have lost three successive matches on the road and were comfortably beaten 3-0 by Fulham on their most recent away day.
Huddersfield have five wins from their last seven games on home turf and have kept three consecutive clean sheets at the John Smith’s Stadium.
However, their form in general has been shaky and a run of just one victory in five has seen them drop out of the playoff positions.
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The Terriers conceded in the 93rd minute to lose 2-1 to Cardiff City a fortnight ago, with Carlos Corberan admitting that it was “a very difficult defeat to accept”.
Huddersfield trail sixth-placed Queens Park Rangers by one point, but travel to the Kiyan Prince Foundation Stadium on Tuesday.
The Yorkshire outfit have won three of their last four meetings with West Brom, with the Baggies failing to win at the John Smith’s Stadium since 2010