Canada became the first team to reach the last eight of the new-look Davis Cup finals with victory over the United States in Madrid.
The Canadian side won both singles rubbers before forfeiting the doubles in the Group F encounter at La Caja Mágica.
Denis Shapovalov secured Canada's place in the next round after beating Taylor Fritz 7-6, 6-3.
Vasek Pospisil, the world number 150, continued his run of upsets with a battling 7-6, 7-6 triumph in the opening singles rubber against Reilly Opelka.
Last year's runners-up France survived a scare as they overcame Japan 2-1 in Group A.
Nicolas Mahut and Pierre-Hugues Herbert, the Australian Open champions, fought back from a set down to beat Ben McLachlan and Yasutaka Uchiyama 6-7, 6-4, 7-5 in the deciding doubles rubber.
Jo-Wilfried Tsonga outclassed Uchiyama 6-2, 6-1 before Yoshihito Nishioka levelled the tie by stunning world number 10 Gaël Monfils 7-5, 6-2.
Singles victories for Nick Kyrgios and Alex de Minaur sealed the tie for Australia in their Group D encounter with Colombia.
Kyrgios despatched Alejandro González 6-4, 6-4 before De Minaur gave Australia an unassailable 2-0 lead with a 6-4, 6-3 win over Daniel Galán.
In Group E, the Netherlands were beaten 2-1 by Kazakhstan after Alexander Bublik and Mikhail Kukushkin defeated Robin Haase and Jean-Julien Rojer 6-4, 7-6 in a tense doubles match.
Argentina were among the other winners today as they beat Chile 2-0 in Group C.
Action in the group stages continues tomorrow.