New York U.S. Open champ Lleyton Hewitt beat Jonas Bjorkman on Friday and even Australia's Davis Cup semifinal with Sweden.
France took a 2-0 lead over the Netherlands in the other semifinal.
Hewitt rallied from a set down for a four-set victory over Bjorkman in Sydney after Patrick Rafter lost in five sets to Thomas Johansson.
In Rotterdam, Dutch player Raemon Sluitter quit after injurying his ankle while leading Arnaud Clement 2-1 in the third set. Then Nicolas Escude outlasted Sjeng Schalken 6-7 (3), 7-6 (4), 4-6, 7-6 (4), 8-6 to put France in command.
The winners will meet Nov. 30-Dec. 2, with either Australia or Sweden playing host for the final.
Hewitt posted a 4-6, 6-4, 7-6 (5), 7-6 (2) victory. Johansson outlasted Rafter 3-6, 6-7 (8), 6-3, 6-2, 6-3.
Elsewhere, host Spain led Uzbekistan 2-0; visiting Morocco was ahead of Belgium 2-0; Romania and the Czech Republic were tied 1-1; Chile was tied 1-1 at Slovakia; Britain led at Ecuador 2-0; and host Argentina led Belarus 2-0.