Javier Mascherano captained Argentina to a dramatic 1-0 victory in Uruguay as the two-times winners left it late to secure qualification for the World Cup.
Mario Bolatti stabbed home the only goal five minutes from the end of a tense encounter to grab South America's fourth invitation to South Africa.
Mascherano played all 90 minutes and is one of four players who national coach Diego Maradona has already confirmed will be in his World Cup squad.
Emiliano Insua played no part after making his debut at the weekend, but he'll have his sights on cementing a regular place by next summer.
Elsewhere, Lucas played 90 minutes for already qualified Brazil as they drew 0-0 with Venezuela.
The full list of Liverpool players potentially featuring next summer after their countries qualified are:
Daniel Agger (Denmark)
Martin Skrtel (Slovakia)
Glen Johnson, Steven Gerrard (England)
Andrea Dossena, Alberto Aquilani (Italy)
Albert Riera, Fernando Torres, Pepe Reina (Spain)
Philipp Degen (Switzerland)
Ryan Babel, Dirk Kuyt (Holland)
Javier Mascherano, Emiliano Insua (Argentina)
Lucas Leiva (Brazil)
Andriy Voronin (Ukraine) and Sotirios Kyrgiakos (Greece) could yet make the trip if their countries win a play-off encounter.
Tagged: javier mascherano , mascherano , world cup