Argentina's players leave the field following a rugby championship test match between South Africa and Argentina, in Durban, South Africa, Saturday, Sept. 27, 2025. (AP Photo/Themba Hadebe)rugby unionArgentina is entrusting the wheel to rookie flyhalf Gerónimo Prisciantelli against South Africa in the Rugby Championship decider at Twickenham on Saturday. The Pumas are out of contention but keen to save face after a 67-30 hiding from South Africa last weekend in Durban. Santiago Carreras was switched from flyhalf to his natural position at fullback, bumping Juan Cruz Mallía to the wing at the expense of Mateo Carreras. South Africa named its team on Tuesday and the only change among the starters was the return of prop Ox Nche.