Leeds United is also a football club based in Leeds, England, founded in 1919.
Sunderland has won six top-flight titles, while Leeds has won three.
Sunderland's stadium is the Stadium of Light, with a capacity of over 49,000, while Leeds plays in Elland Road, with a capacity of over 37,000.
Sunderland was relegated from the Premier League to the Championship in the 2016-17 season, while Leeds narrowly missed out on promotion to the Premier League in the 2019-20 season.
Leeds and Sunderland have a history of fierce rivalries with other football clubs, including Newcastle United for Sunderland and Manchester United for Leeds.