Much has been made of Liverpool's relationship with recent opponents, Southampton, in recent years, but it is Sunderland, who visit Anfield on Saturday, who have shared more players with the Reds over the decades.
Howard Gayle, Alan Kennedy, Don Hutchison, Barry Venison, Phil Babb, Jason McAteer, Sotirios Kyrgiakos, Bolo Zenden, Fabio Borini and Sebastian Coates are among those to have turned out for both clubs.
This list could have grown further had Rafa Benitez succeeded in signing Kenwyne Jones in either 2007 or 2010 or Kenny Dalglish added Lee Cattermole to his squad in 2011 or Darren Bent in 2012.