If you gave these pairs an opportunity to fight on Survivor they would do so.
http://www.ranker.com/list/which-survivor-contestants-hate-each-other-the-most-/stokified,
Shane Powers and Courtney Marit
Tom Westman and Caryn Groedel
Brandon Quinton and Frank Garrison
Colby Donaldson and Jerri Manthey
Reynold Toepfer and Shamar Thomas
Sophie Clarke and Albert Destrade
Francesca Hogi and Phillip Sheppard
Russell Hantz and Sandra Diaz-Twine
Shambo Waters and Laura Morett
Ricahard Hatch and Sue Hawk