Last night's Cupset...published at 18:54 GMT 16 January 2019
Shocks can still happen - Watch highlights as League One Shrewsbury come from two goals down to beat Championship Stoke and reach the FA Cup fourth round.
Summary
Watch game on BBC One and listen on BBC Radio 5 live
Keogh scores winning spot-kick to set up tie with Accrington in round four
Saints led 2-0 through Armstrong and Redmond strikes
Wilson free-kick reduces the deficit before Waghorn heads in
Derby's Bryson earlier had finish ruled out by VAR for narrow offside call
Last night's Cupset...published at 18:54 GMT 16 January 2019
Postpublished at 18:54 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
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End of X postAnd then there was one...published at 18:52 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
Away from spying for a moment and let's look at tonight's game - all but one name is in the hat for the FA Cup fourth round.
Yes, the very future of the British Government may be up in the air right now - but who cares about that when there's a cup replay to concentrate on?
Image source, Getty ImagesNot us.
Saints or Rams? And I'm not talking NFL either...
get involved Get Involvedpublished at 18:51 GMT 16 January 2019
#bbcfootball or 81111 on text (UK only)
You can sound off about spying, coaching, preparation, the FA Cup or just about anything else you like tonight - the usual channels.
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End of X postRams make six changespublished at 18:51 GMT 16 January 2019
BreakingSouthampton v Derby (19:45 GMT)
Six changes for Derby - Marcelo Bielsa knew that.
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End of X postSaints change fivepublished at 18:49 GMT 16 January 2019
BreakingSouthampton v Derby (19:45 GMT)
SouthamptonA pretty strong team, considering that the Saints are in a relegation fight.
Just five changes from the weekend. Angus Gunn is back in goal.
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End of X postPostpublished at 18:46 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
Of course, most of this info is not secret. Anyone can watch all games of football these days, and you'd imagine most big clubs do analyse their opponents at a high level.
If they didn't before, then the chairman will be on the phone now anyway asking why not...
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End of X postMake some notes, Ralph...published at 18:42 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
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End of X postBielsa then went on to show - in vast detail - all the data he has at his hands. Most of which seemed to be about Derby County...
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End of X post 2Leeds spied 'on all opponents' - Bielsapublished at 18:40 GMT 16 January 2019
Image source, Getty ImagesBielsa revealed that Leeds have watched all their opponents train before facing them this term.
"I observed all the rivals we played against and watched the training sessions of all opponents," he said.
The Elland Road club are four points clear at the top of the Championship, as they bid to return to the Premier League for the first time since their relegation in 2004.
Bielsa's impromptu press briefingpublished at 18:38 GMT 16 January 2019
Image source, Rex FeaturesSome Leeds fans briefly began to panic earlier today, as their head coach Marcelo Bielsa called an unexpected press conference, amid ongoing FA and EFL investigations in to the 'spy' saga.
Before Friday's win over Derby, the ex-Argentina manager admitted sending a staff member to watch the Rams train, which Derby boss Frank Lampard described as "unethical".
But fear not, Leeds fans - he was not announcing a shock resignation. Instead, the 63-year-old - in front of a packed room of journalists - made something of a confession...
Licence to thrill?published at 18:37 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
Image source, Getty ImagesYou can't mention Derby at the moment - or Leeds - without talk of spies.
Why?
Well, if you somehow missed the big furore in the last week, Leeds boss Marcelo Bielsa had to be "reminded of the integrity and honesty" of his club after he admitted sending a staff member to 'spy' on a Derby County training session.
It was all a bit odd.
But it got odder this afternoon...
How do you beat Derby?published at 18:30 GMT 16 January 2019
Southampton v Derby (19:45 GMT)
If Southampton boss Ralph Hasenhuttl needed any pointers in how to beat Derby tonight - he was handed a few in an extraordinary news conference up in Leeds this afternoon...
Image source, TwitterAre you listening carefully?