Correct me if I'm wrong...
Never seen racing - Lisa & Nicole, Rachel & Vicky, Brandon & Alphaeus
last seen in leg 3 - Rei & Kenji (these teams are first four boots)
eliminated in leg 6 - Alex & Will (7th place)
last seen in leg 7 - Tom & Anita
last seen in leg 8 - JK & Mike
last seen in leg 9 - Chloe & Yvonne
F4 - Louisa & Treasuri, Parul & Maggie, Eric & Rona and one of Tom & Anita/JK & Mike/Chloe & Yvonne