Kieffer Moore celebrates after scoring Wrexham's fourth goal in the clash with the Blades.
The Welsh international scored twice as Phil Parkinson's side produced a remarkable comeback from a two-goal deficit to defeat his old team Sheffield United in a pulsating 5-3 second-tier encounter.
The forward's excellent first-time shot put United ahead, but the hosts equalised just two minutes later courtesy of a deflected own goal.
Bamford's second and a Callum O'Hare nod seemingly have put the visitors in a comfortable lead at 3-1, before the towering striker pulled one back with a thumping goal of his own.
Ryan Longman's header early in the second period made it all square, before the goalscorer to put Wrexham ahead for the first occasion with 14 minutes left to play.
Josh Windass' confident penalty in the closing stages sealed the win, halting a sequence of five games without a win for the Welsh club.
In their previous meeting in the cup competition nearly three years ago, it ended in a epic six-goal stalemate.
Friday's encounter delivered another high-octane, dramatic installment in their growing rivalry.
Backed by high-profile investors, Wrexham's remarkable ascent through the divisions has brought them back to the Championship for the first time in 43 years.
Ahead of this Boxing Day match on the following a winless run, the boss had demanded a replication of the characteristic fighting qualities from those past encounters.
The players undoubtedly delivered, overcoming a two-goal hole to secure a famous 5-3 victory that highlights their resilient character.
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