Jennifer and Rex have not seen eye-to-eye in the house
Big Brother housemate Jennifer Clark is the bookmakers' favourite to get the boot from the Channel 4 show.
The 22-year-old part-time model will face the public vote along with chef Rex Newmark, 24, after both of them received six nominations each.
The contestant who is voted out will become the third contestant to be evicted from series nine.
Student Stephanie McMichael and Sylvia Barrie have already been ousted by a public vote.
Housemates Alexandra De-Gale and Dennis McHugh, meanwhile, were removed from the show for unacceptable behaviour.
Speaking in the diary room, Rex, who nominated Jennifer, said: "She is the boiling point of all arguments."
Dale Howard nominated Rex and branded him "controlling".
Kathreya Kasisopa, a 30-year-old Thai-born massage therapist from Kent, is the current favourite to win the show.