Argentina lost their way following last month's historic 21-17 victory over Australia in the Rugby Championship, wing Juan Imhoff admitted.
Italy captain Sergio Parisse said that his side hope to take advantage of their extra day of rest ahead of the clash with the Springboks.
Argentina battled back in the second half to claim a tight 20-18 victory over Italy in Genova on Friday.
Heavy rains in recent days in the flood-hit city of Genoa have forced the rescheduling of the Test between Italy and Argentina.
REPORT: Scotland produced their best performance of the year to demolish a lacklustre Argentina, winning 41-31 on Saturday.
Argentina coach Daniel Hourcade is wary of the influence of his opposite number when they take on Scotland at Murrayfield on Saturday.
Argentinean coach Daniel Hourcade named a team of contrasts to face Scotland in the opening match of their year-end tour.
The Gray brothers, Richie and Jonny, were named in Scotland's second row for Saturday's Test against Argentina in Edinburgh.
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