Samoa must upset defending champions South Africa on Friday or hope Fiji conquer Wales to reach their first World Cup quarterfinal in 16 years.

The Samoans haven't got close to the Springboks in three previous World Cup encounters and face their tournament moment of truth just five days after their physically demanding 27-7 win over Fiji at Eden Park.

Samoa may still squeeze into the last eight with a bonus point loss coupled with a Fijian upset of Wales in Hamilton on Sunday.

The Springboks are unbeaten in the tournament and appear to be running into form ahead of the quarter finals where they are likely to face fellow two time champions Australia in Wellington.

Discipline under pressure will be Samoa's biggest concern as they were guilty of throwing away their chances in a crucial 17-10 loss to Wales by conceding penalties at the breakdown.

The Samoan team to take on South Africa include Tusi Pisi, Alesana Tuilagi, Mahonri Schwalger, Census Johnston, Daniel Leo, Kane Thompson, George Stowers, Kahn Fotuali’i, Seilala Mapusua and Paul Williams.

Manu Samoa will take on the Springboks at 7.30pm Friday at Eden Park.

Story by: Vijay Narayan