Italy captain Sergio Parisse expects Saturday's test match against World Cup semi-finalist Argentina to be harder than last week's 30-20 defeat against Australia.
''It's going to be even harder than last week,'' Parisse said.
''We're up against one of the strongest front rows in the world. The South Americans are unbeatable there, so we've been working hard on our line-outs and mauls''.
Italy lost too much line-out and loose balls against the Wallabies but still had a chance of going ahead before a late try clinched the win for Australia.
Italy coach Nick Mallett has made two changes to the front row that struggled against Australia.
The Saracens pairing of hooker Fabio Ongaro and prop Matias Aguero come in for Leonardo Ghiraldini and Salvatore Perugini who commentators said were under par against the southern hemisphere giants.
Asked if he had a special game plan to stop the Pumas, Mallett said: ''You'll see that tomorrow''.
''Last week's performance is a good starting point,'' he said.
Gloucester prop Carlos Nieto is the only survivor of the front three that started against Australia.
The Pumas, who lost 12-6 to fellow World Cup semi-finalists France in a hard-fought match in Paris on Saturday, have one of the most powerful packs in the world.
''Argentina has an exceptional pack and it will be a hard-contact game,'' Mallett said.
''We have trained over the last few days to be up to the task and the front-row changes go in this direction''.
In the only other change, Mallett has drafted in centre Matteo Pratichetti to replace the injured Gonzalo Canale.
The other 12 players who ran the Aussies close were confirmed for the Argentina game with fly half Andrea Marcato having shaken off a knock and centre Andrea Masi confirmed in his new position at full back.
Mirco Bergamasco, moved out from centre to the wing again, said: ''We are focused (and) we are aiming for a home win, which we deserve after Saturday's good display''.
Bergamasco scored a fine try against the Wallabies to put Italy 14-11 up after half an hour.
Italy were level with Australia at 20-20 with 13 minutes to go and had a chance to take the lead but Luciano Orquera's penalty attempt drifted narrowly wide.
Australia snatched the win with a try seven minutes from the final hooter.
Italy, who fell back in the Six Nations in Mallett's first season with only one win compared to two in 2007, end their three-test autumn series against the Pacific Islanders in Reggio Emilia on November 22.
