5 reasons why the Steel City derby is one of England's fiercest fixtures

#5 Form goes out the window

Chris Waddle's free-kick took the match to extra time, which Wednesday went on to win 2-1.

It's not uncommon for the out-of-form or side that lacks the quality to triumph in these ties. You might as well not look at the table before the kick-off to get an idea who has the better chance, it doesn't seem to matter.

What matters, though, is which side turns up and is most motivated on the day. It's Luhukay's second Steel City Derby as a manager, and Wilder's third, but the United boss has plenty of experience of this game as a fan and player.

The most prevalent example of the unpredictability was back in the 1993 FA Cup Semi-Final. Over 75,000 Sheffielders packed out the terraces at the old Wembley and produced an atmosphere of biblical proportions.

Wednesday were one of the best sides in England and boasted several of the country's internationals, while United were a mid-table top division side.

The gulf in quality was evident through the game, but, as is typical in these matches, just a solitary goal decided the fixture and it took until extra-time for the winner to be scored.

United were leading the Championship before this weekend's matches, and currently sit in second. Wednesday, meanwhile, were demolished 4-0 at home against Norwich City in another humiliating defeat this campaign. With The Blades having the home advantage, you'd normally expect Friday's game to be a slam-dunk home win, but as explained before, this fixture is predictably unpredictable and nothing can be taken for granted.

Who do you think will come out on top in Friday's derby? Let us know in the comments below!