Madrid, Madrid, Spain, 1 October 2015 | tennis.com.au

Australia stands atop its round robin group at the Junior Davis Cup finals after dismissing Colombia 3-0 in its second tie in Madrid.

The victory – anchored by straight-sets singles wins to Alexei Popyrin and Alex De Minaur and completed when De Minaur and Blake Ellis won the doubles rubber – was a second consecutive 3-0 win for the green-and-gold.

As a result, they head Group D with a perfect 6-0 record in rubbers and 12-0 in sets.

A win over Germany – the group’s second-placed team – would ensure Australia’s progression to the competition semifinals.

Australia’s girls remain on track for a similar result, winning their second straight round-robin match in Group A of the Junior Fed Cup finals.

The 2-1 victory over the Netherlands – helped by solid play from Destanee Aiava – puts the girls in first place in the group, just above the top seeded Czech Republic.

On Thursday, Australia will face the Czechs for a place in the semifinals.

Results Day 2

Boys Group D

AUSTRALIA (2) defeated COLOMBIA 3-0
Alexei Popyrin (AUS) d. Nicolas Mejia (COL) 7-5 6-3
Alex de Minaur (AUS) d. Alejandro Hoyos (COL) 6-0 6-1
Alex de Minaur/Blake Ellis (AUS) d. Alejandro Hoyos/Nicolas Mejia (COL) 6-1 6-2

GERMANY (5) defeated SOUTH AFRICA 2-1
Marvin Moeller (GER) d. Albertus Kruger (RSA) 6-2 7-6(1)
Nicola Kuhn (GER) d. Joshua Howard-Tripp (RSA) 6-2 6-0
Albertus Kruger/Richard Thongoana (RSA) d. Nicola Kuhn/Maximilian Todorov (GER) 5-7 6-4 6-1

Girls Group A

AUSTRALIA (5) defeated NETHERLANDS 2-1
Suzan Lamens (NED) d Seone Mendez (AUS) 7-6(5) 7-6(4)
Destanee Aiava (AUS) d Isolde de Jong (NED) 6-3 1-6 6-3
Destanee Aiava/Jaimee Fourlis (AUS) d Isolde de Jong/Suzan Lamens (NED) 6-3 6-4

CZECH REPUBLIC (1) defeated ARGENTINA 3-0
Monika Kilnarova (CZE) d Paula Baranano (ARG) 6-1 2-6 6-3
Marketa Vondrousova (CZE) d Maria Lourdes Carle (ARG) 6-2 6-4
Monika Kilnarova/Anna Slovakova (CZE) d Paula Baranano/Camila Moreno (ARG) 3-6 6-2 6-2