Kieffer Moore celebrates after scoring the fourth goal of the game in the clash with the Blades.
Kieffer Moore scored twice as Wrexham produced a remarkable fightback from a two-goal deficit to defeat his former club Sheffield United in a pulsating 5-3 Championship contest.
Patrick Bamford's sweetly-struck first-time shot put United ahead, but Wrexham equalised just two minutes later courtesy of a deflected own goal.
A quickfire double from Bamford and a Callum O'Hare nod appeared to have handed United in command at 3-1, until the towering striker pulled one back with a thumping header of his own.
Ryan Longman's glancing effort early in the second period brought the scores level, paving the way for the goalscorer to put Wrexham ahead for the first occasion with 14 minutes remaining.
The midfielder's confident penalty late on sealed the win, halting a run of five matches without victory for the Welsh club.
In their previous meeting in the cup competition nearly three years ago, it ended in a thrilling six-goal stalemate.
Friday's encounter delivered a further high-octane, dramatic chapter in their recent history.
With the support of high-profile investors, Wrexham's remarkable ascent through the divisions has led them back to the Championship for the first time since the 1980s.
Ahead of this Boxing Day match on the following a poor patch of form, manager Phil Parkinson had called for a replication of the characteristic spirit from those cup ties.
His team undoubtedly delivered, battling back from a 3-1 deficit to secure a famous 5-3 victory that underscores their resilient character.
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