With figures gathered from Transfermarkt, here's a look at how both club's average home support over the last decade...
17. 2017/18 - Sheffield Wednesday
Division: Championship. Average home attendance: 25,995. (Photo by Harry Murphy/Getty Images) Photo: Harry Murphy
18. 2017/18 - Sheffield United
Division: Championship. Average home attendance: 26,414. (Photo by Gareth Copley/Getty Images) Photo: Gareth Copley
19. 2018/19 - Sheffield United
Division: Championship. Average home attendance: 26,117. (Photo by Dan Istitene/Getty Images) Photo: Dan Istitene
20. 2018/19 - Sheffield Wednesday
Division: Championship. Average home attendance: 23,867. (Photo by George Wood/Getty Images) Photo: George Wood