A new-look Fijian side, with only a handful of players backing up from the Pacific Rugby Cup earlier this year, thumped USA Selects 62-12 at the weekend in Montevideo, while the Samoans slotted a last minute penalty to topple hosts Uruguay A 44-42.
Fiji coach Senirusi Serevakula said they want to improve their set pieces in what is "the important game of this tour".
