Manchester City Football Club is an English football club based in Manchester that competes in the Premier League, the top flight of English football. Founded in 1880 as St. Mark's (West Gorton), it became Ardwick Association Football Club in 1887 and Manchester City in 1894. The club's home ground is the City of Manchester Stadium in east Manchester, to which it moved in 2003, having played at Maine Road since 1923. Manchester City entered the Football League in 1899, and won their first major honour with the FA Cup in 1904. It had its first major period of success in the late 1960s, winning the League, FA Cup and League Cup under the management of Joe Mercer and Malcolm Allison. After losing the 1981 FA Cup Final, the club went through a period of decline, which eventually saw them relegated as far down as third tier of English football by the end of the 1997–98 season. They since regained promotion to the top tier in 2001–02 and have remained a fixture in the Premier League since 2002–03. In 2008, Manchester City was purchased by Abu Dhabi United Group for £210 million and received considerable financial investment. The club have won six domestic league titles. Under the management of Pep Guardiola they won the Premier League in 2018 becoming the only Premier League team to attain 100 points in a single season. In 2019, they won four trophies, completing an unprecedented sweep of all domestic trophies in England and becoming the first English men's team to win the domestic treble. Manchester City's revenue was the fifth highest of a football club in the world in the 2018–19 season at €568.4 million. 2019, Forbes estimated the club was the fifth most valuable in the world at $2.69 billion, however the sale of a 10% stake in the club's parent company City Football Group on 27 November 2019 for $500 million values them significantly higher.

Etihad Stadium

Sunderland Association Football Club is an English professional football club based in Sunderland that plays in the Premier League. Since its formation in 1879, the club has won six First Division titles—in 1892, 1893, 1895, 1902, 1913, and 1936, the FA Cup twice, in 1937 and 1973 and the FA Community Shield in 1936. They were also Football League Cup finalists in 1985 and 2014. Sunderland won their first FA Cup in 1937 with a 3–1 victory over Preston North End, and remained in the top league for 68 successive seasons until they were relegated for the first time in 1958. Sunderland's most notable trophy after the Second World War was their second FA Cup in 1973, when the club secured a 1–0 victory over Leeds United. The team has won the second tier title five times in that period and the third tier title once. Sunderland play their home games at the 48,707 capacity all-seater Stadium of Light having moved from Roker Park in 1997.The original ground capacity was 42,000 which was increased to 49,000 following expansion in 2000. Sunderland have a long-standing rivalry with their neighbouring club Newcastle United, with whom they have contested the Tyne–Wear derby since 1898. Since their establishment in the Premier League in 2007, Sunderland have became one of the world's wealthiest football brands, being valued at USD $93 million in 2014, 31st in the world overall