John Egan’s stoppage-time goal rescued Sheffield United against non-league Wrexham in a frenetic FA Cup fourth-round tie.

Goals from James Jones and Tom O’Connor put the Welsh side ahead before Oliver Norwood equalised for the Blades, who had Daniel Jebbison sent-off.

Paul Mullin’s goal four minutes from time looked to have secured a shock, but captain Egan levelled late.

Egan’s late goal proved to be the final twist of a enthralling game which pitted the National League leaders against the team second in the Championship.

Wrexham co-owner, Hollywood star Ryan Reynolds, was at the Racecourse to see his side put in a tremendous display in their first fourth round appearance since 1997.

Naming an unchanged team, Dragons boss Phil Parkinson said the aim was to make it an afternoon as “difficult as possible” for the Championship title contenders.

Parkinson accepted his side, unbeaten in 16 league games, went into the game as underdogs – just as they did prior to the previous round’s win at Coventry.

Sheffield United showed five changes to the side which had won 1-0 against Hull City to extend their unbeaten run to nine games.

And from the kick-off the Blades showed their intent, winning a corner inside the opening two minutes from which the returning McBurnie headed home.

Wrexham’s hopes suffered a double blow with defenders Jordan Tunnicliffe and Aaron Hayden forced to leave the field with injuries with barely seven minutes of the game gone.

But the hosts responded positively to those early setbacks with Mullin leading the charge as he looked to add to the seven goals already netted in this season’s competition.

The visitors were looking dangerous on the break and a strong run and subsequent shot from Jebbison was palmed away by Mark Howard with the former Blades keeper also denying Doyle soon after.

Both sides were playing their part in an entertaining, end-to-end cup tie, which did not let up at any stage of the first half.

Elliot Lee had a shot from the edge of the area blocked before Mullin was brought down on the edge of the penalty, but he struck the free-kick against the United wall.

Having ended the first half strongly Wrexham made a storming start to the second period.

Captain Luke Young’s shot saved was by Adam Davies with Mullin failing to net with the rebound before the United defence cleared.

But two minutes later the home side did level when a trademark Ben Tozer long throw was hooked on by Tom O’Connor and substitute Jones scored.

Wrexham were now on top and the United defence failed to clear a corner before O’Connor smashed the ball home to send the home supporters into raptures.

Celebrations had barely died down when Paul Heckinbotham’s men levelled against the run of play four minutes later.

The home defence failed to clear substitute Billy Sharp’s cross and Norwood coolly slotted home past Howard.

The enthralling tie took another turn when Jebbison was shown a red card following an off-the-ball clash with Tozer, in which he kicked out at the defender.

Wrexham pressed forward for a winner and with four minutes of the 90 remaining, Mullin collected a pass from substitute Sam Dalby before placing the ball under Davies for his eighth goal in the competition.

But Wrexham’s hopes of adding another scalp to their notable FA Cup history were dashed in stoppage time with Egan finding the net from Doyle’s corner to ensure the sides will need to meet again at Bramall Lane.