The second week of the European Challenge Cup sees three games played on Friday and seven scheduled for Saturday. Half the matches will feature Americas player. Facundo Bosch will start at hooker for Agen against Benetton Treviso on Friday with Colombian lock Andrés Zafra named on the bench.
Former Pumitas hooker Ignacio Calles will cover loosehead prop for Pau against Stade Français on Saturday. Sergio Parisse captains the visitors from Paris with Ramiro Herrera named on the bench.
The Ospreys are in Worcester and will have promising Argentine loose forward Guido Volpi among their reserves. Patricio Fernández will again wear No10 for Clermont Auvergne against Romanian side Timisoara, and Mariano Galarza continues at lock for new club Bordeaux against Perpignan.