Australia advanced to a September semifinal against archrival Argentina after sweeping outmatched Belarus with a 5-0 demolition in Davis Cup world group semifinals Sunday.
Wayne Arthurs and Chris Guccione completed the sweep for the hosts and put Australia in the semifinals for the fifth time in eight years.
The South Americans harvested a dramatic final rubber lasting well over four hours in Zagreb before Juan Chela clinched a 3-2 victory for the visitors over Croatia as he defeated Sasa Tuksar 3-6, 6-4, 7-6 (8-6), 7-6 (7-5).
Ivan Ljubicic had kept the defending champions in the chase when he began the day with a win over David Nalbandian 6-3, 6-4, 6-4.
Sasa Tuksar fought hard but was unable to clinch a dream victory in the deciding fifth rubber.
For Argentina, Australia's Hewitt ranks as tennis public-enemy number 1, after several problems with Argentine players over the years including a spitting incident from Juan Chela in Melbourne and serious trash talk between feisty Hewitt and Argentine Guillermo Coria at last summer's Davis encounter.
An Australia tie in Argentina is sure to bring out legions of hostile home support.
Russia knocked out France 4-1 in a third consecutive match-up, nailing down a place in the last four as injury substitute Dmitri Tursunov overcame Richard Gasquet 6-1, 3-6, 6-7 (4-7), 6-3, 7-5.
The Russians will face the United States, who defeated Chile 3-2 with Andy Roddick's Sunday victory in reverse singles.
Roddick defeated Chile's Fernando Gonzalez 4-6, 7-5, 6-3, 6-2.
The streaky Gonzalez started strong and took the first set, but Roddick said later that his first break of the Chilean's serve in the second set was a turning point.
"I guess I'm at the right place at the right time," world number four Roddick said, "There's no better feeling than to win with all these fans cheering you on."