Both sets of fans will not know who to boo when Crystal Palace and Newcastle United hold an old boys’ reunion on Sunday.
Striker Dwight Gayle, for starters, may well line-up for Newcastle at his old stomping ground in the vital Premier League relegation clash.
Palace, meanwhile, have former Mapgies players Yohan Cabaye, Andros Townsend and Patrick van Aanholt - remember his brief loan spell on Tyneside in 2010? - on their books.
Now click the link above to recall other names to have played for both clubs.