Boro have won just one of their previous seven Championship games as the pressure begins to mount on Warnock on Teesside.
A limp defeat to Reading at the weekend left Boro 18th in the table with nine points from their opening nine games of the season.
But the game against the Blades, who sealed a late win over Derby County thanks to Billy Sharp’s penalty on Saturday, has an added spice to it with Warnock going up against the club he helped guide to the Premier League back in 2006.
United are one of many clubs Warnock has managed throughout his over 40-year spell in management.
It means more often than not each season Warnock will come up against some regular foes from his resume and we wondered just what his winning record was like when coming up against those sides?
Here at The Mail we’ve taken a look back at the Boro boss’ last 22-years in management since joining tonight’s opponents Sheffield United in early December 1999.
We’ve looked at every time he has come up against a former side in each of those seasons right up until his most recent encounter with Queens Park Rangers at the Riverside last month to see which of those sides he tends to fair well against and those he does not.
For reference, we have only considered games against teams after he has managed that club.
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5. Bury - 100%
Before joining Sheffield United Warnock had another brief stint in management at Gigg Lane this time with Bury. Warnock welcomed the Shakers to Bramall Lane for a League Cup tie in 2006 which his side won 1-0. Mandatory Credit: Michael Steele /Allsport
Photo: Michael Steele
6. Sheffield United - 44%
It is with the Blades where Warnock really made his name in management spending seven-and-a-half years with the Steel City club - still to this day his longest spell at one club. Warnock guided the Blades to the Premier League during his time at Bramall Lane before leaving at the end of the 2006-07 campaign. Warnock has gone up against United nine times since his exit winning on four occasions. (Photo by Ian Walton/Getty Images)
Photo: Ian Walton
7. Crystal Palace - 57%
Having spent the summer of 2007 without a club it wasn’t long before Warnock was back in football this time with Crystal Palace. He spent two-and-a-half years at Selhurst Park before leaving amidst the clubs financial troubles before returning for a short spell in 2014. Warnock has won four of his seven meetings with the Eagles since leaving in 2010. (Photo by Scott Heavey/Getty Images)
Photo: Scott Heavey
8. Queens Park Rangers - 25%
Warnock wasn’t out of work long following his Palace exit, quickly taking up the role at QPR in March 2010 where he would spend just under two years after guiding the club to the Premier League. Warnock’s pickings against the R’s have been slim since his exit however with just two wins from eight meetings, both with Cardiff. (Photo by Clive Mason/Getty Images)
Photo: Clive Mason