Sheffield United boss Paul Heckingbottom says his players must focus on the game as former manager Chris Wilder returns to the club for the first time with Middlesbrough.
Wilder led The Blades to the Premier League before leaving in March 2021.
"The job he did was remarkable. It was one of the golden periods of Sheffield United's history," Heckingbottom told BBC Radio Sheffield.
"It's the first time he's been back and it'll be strange and different but that won't affect him on the day.
"He'll get a great reception. It's great to have him back.