After having the first week off, the Pacific Islanders are favourites to down first-timers Chile, who were comfortably beaten by Japan last time out.
It has been a fairly promising build-up to the World Cup for Samoa, which included wins over Japan and Tonga alongside a narrow defeat to Ireland.
With Argentina next up, they will hope to bag a bonus-point win to mark themselves out as the Pumas’ chief rivals for second place in Pool D.
Not since 1995 have they reached the quarter-finals.
Where to watch Samoa vs Chile
TV channel: In the UK, this afternoon’s game will be shown live and free to air on ITV4, with coverage starting at 1.30pm BST ahead of a 2pm kick-off.
Live stream: Fans can also watch all the action live online via the ITVX website and app.