Former Republic of Ireland striker Tony Cascarino
Former Republic of Ireland striker Tony Cascarino is predicting a different kind of Sheffield double this season.
For fans of Wednesday and United, the term usually means their side has won while the other has lost - something of a rare phenomenon in 2016-17.
The Blades currently sit comfortably atop the third tier, with rivals Wednesday equally cosy inside the Championship play-off places.
And according to Cascarino, both sides will be playing at a higher level next term.
"Under Chrissy Wilder, I think Sheffield United will win the league - it's been a brilliant season for them so far," the 54-year-old told Talksport this morning (Wednesday). "And likewise I think Wednesday will make it - at worst play-offs.
"If you look at their goals against column - 29. Defensively they’ve only conceded one or two goals since the turn of the year - that’s a lot of clean sheets . I think they’ll go as well."
Wednesday had previously struggled to replicate the form which saw them narrowly miss out on a place in this season's Premier League, but appear to be hitting form at just the right time - winning three straight league matches.
And as a striker himself, representing the likes of Celtic, Aston Villa and Olympique Marseille, Cascarino believes one of the Owls' January recruits could make all the difference in the campaign's final third.
"I really like the signing of Jordan Rhodes," he added. "I think it's a very clever signing. Yes it seems very expensive from the outside but Jordan will get goals at that level, he's always got goals.
"And he’ll create as well. He’s a nuisance, he’s good in the air. He’s not the quickest but he’s always on the move around the 18-yard box. I think Sheffield Wednesday will make the play-offs and be one of the teams to beat because they’re a good side."
Sheffield Wednesday's Jordan Rhodes celebrates with dad, Andy, after scoring his first Owls goal
Rhodes has scored once in three matches for Wednesday so far - the same as United's January recruit James Hanson.
Where will Sheffield Wednesday and Sheffield United finish the season?