Only Blackburn Rovers (39) have dropped more points from winning positions than Sheffield United (34) since the start of last season in the Championship.
And having twice lost against Wrexham last term after going in front on both occasions, Wilder will have been hugely impressed by his side's defensive effort this time around.
They dominated much of the first half, and even after Wrexham started to come to life in the second half, the Blades looked rock solid throughout.
It ensured they kept a fifth clean sheet of the campaign in the league to maintain their charge up the table.
The visitors were without attackers Josh Windass, Nathan Broadhead and Callum O'Hare in South Yorkshire, and it certainly showed.
The away side ended the contest with an expected goals (xG) figure of just 0.6 - with their only effort on target coming from Smith in the last minute of added time.
Since the start of last season's Championship, Wrexham's win rate drops from 40.4% to 27.3% when Windass is not involved.
Their points-per-game figure also falls from 1.53 to 1.18 without last season's top scorer Windass.
It has swiftly become evident that they desperately need to find another way of carrying a threat in the final third without the aforementioned forward's talents.