Overview
- Head coach Steve Tandy said the pair were brought in to support preparation for the final two weeks of the autumn campaign.
- The call-ups raise the number of players available for game three of the series to 41.
- Roberts, a Scarlets centre, has six caps and last featured on the summer tour of Japan, while Ospreys tighthead Warren is uncapped.
- Wales host New Zealand in Cardiff on Saturday in the Autumn Nations Series.
- The South Africa fixture the following weekend falls outside World Rugby’s Test window, so players based outside of Wales will be unavailable.