Last weekend, Town had 30 shots without scoring against Swansea City as the two teams battled out a 0-0 draw.
It confirmed the main challenge that Wagner must overcome in his quest to give his team a second season in the Premier League: scoring more goals.
Huddersfield Town have failed to score in a league-high 16 matches this season.
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Last weekend they were not the first team to come up short against an obdurate Swansea defence.
The Terriers joined two others to have amassed more than 25 shots against the Welsh side this season without scoring.
"You cannot ask for much more, sometimes you need luck and the football god has to be on your side, today this wasn't the case," Wagner told the club's official website.
Giving him hope for Saturday is that his side will be facing a Palace team who have lost four matches in a row and have kept only five clean sheets all season. No team have kept fewer.
Also, one of the three occasions that Huddersfield Town have scored more than two goals in a PL match this season came in the reverse fixture, when the Terriers won 3-0 at Selhurst Park.