We profile a select few stars who have played for both clubs.
Shay Given (SAFC 1996, Man City 2009-2011)
Given joined the Black Cats on loan in January 1996 from Blackburn Rovers. Given played 17 times for the club keeping 12 clean sheets and helping the team win promotion to the Premier League as champions.
The Ireland international joined Manchester City after almost nine years at Newcastle United. During his time at Eastlands, City won the FA Cup as well as qualifying for the Champions League for the first time in their history. Given made 69 appearances in his two years at the club before moving onto Aston Villa.
Paul Stewart (Man City 1987-1988, SAFC 1996-1997)
Stewart joined Manchester City from Blackpool in March 1987, where he went onto score 26 league goals in 51 league games which earned him a move to Terry Venables’ Tottenham Hotspur.
The striker initially joined Sunderland on loan in 1995, before joining them on a free transfer in March 1996 and helping them win promotion to the Premier League as Division One champions - the second time in three seasons that Stewart had played in such a team. In total Stewart made 34 league appearances scoring 5 league goals.
Niall Quinn (Man City 1990 -1996, SAFC 1996-2002)
Quinn joined Manchester City from Arsenal in March 1990. He scored 22 times in his first full season for the club; he went on to spend six years at the club, scoring 78 goals in 245 appearances.
Quinn joined Sunderland in August 1996 for a then club record £1.3 million. His partnership with striker Kevin Phillips was one of the most prolific in the Football League and helped the club to promotion to the Premiership. Quinn also became the first player to score at The Stadium of Light, against Manchester City in 1997. He won both the Sunderland and North East Sportswriters' Player of the Year awards in 1999 after scoring 21 goals in Sunderland's record-breaking Division One title-winning season. His final appearance for Sunderland came on 19th October 2002 against West Ham.
Heading the Drumaville Consortium of wealthy Irish businessmen, in June 2006 Quinn successfully brokered a deal to buy a controlling stake in Sunderland. In July 2006 Quinn became the chairman and manager of Sunderland, however after only six games in charge, which included one win and five defeats, he decided to step aside as manger and on 28th August 2006 he appointed Roy Keane as first-team manager.