Skipper Keogh leads from the front for Derby as Saints go marching out of Cup
Southampton 2 Derby County 2 (Derby Co win 5-4 on penalties)
If only Ralph Hasenhuttl had tuned into Marcelo Bielsa's remarkable lecture on how to beat Derby County. The Southampton manager could clearly have learned something from his counterpart at Leeds United, who spent much of the afternoon detailing the strengths and weaknesses of a Derby side that showed enough quality to take this replay all the way before finally coming through a nerveless penalty shootout.
The additional 30 minutes of football was the last thing Hasenhuttl would have expected after Southampton struck twice through Stuart Armstrong and Nathan Redmond.
But the irrepressible Harry Wilson led the fightback for Frank Lampard's side, scoring one and then creating another for Martyn Waghorn to send this the distance and even relegate the Prime Minister's speech onto BBC Two.
In the shootout, it was Redmond who proved to be the villain. He was the only player to miss, sending his effort into the stands and allowing Ireland international and Derby captain Richard Keogh to secure a memorable victory for the Championship side and their fledgling manager.
The lingering question, before all this, was whether Derby should have been leading long before the drama started. They played the better football over the 90 minutes, and scored a terrific goal in the first half, through Craig Bryson, that was infuriatingly ruled out, following a painstaking VAR review, for the tightest of offsides.
Just before half-time Shane Long required treatment on a knee injury but re-appeared for the second half before being substituted on 73 minutes when Southampton led 2-0.
At that point, it looked to be an easy night for the Saints. Within the hour, however, they were marching out.