Melbourne VIC, Australia, 15 December 2016 | tennis.com.au

Olivia Gadecki powered into the quarterfinals of the 16/u Australian Championships with a commanding win over Annerly Poulos on Thursday.

Gadecki and Poulos met just last week in the final of the 14/u tournament, with Gadecki emerging trumphant in three sets.

Yet the second time around, the No.2 seed was in sharper form, dismissing Poulos 6-2 6-1 to reach the last eight of the higher age group.

> view the girls’ 16/u Australian Championships draw

There she will meet Patricia Apisah – whose older sister, Violet, recently won the WTA Future Stars event in Singapore – who reached the quarterfinals with a 6-3 6-2 win over Yasmin Glazbrook.

Also advancing on Thursday were top seed Gabriella Da Silva-Fick and No.3 seed Lisa Mays.

In the boys’ 16/u tournament, three of the top four seeds – Alexander Crnokrak (1), Matthew Dellavedova (2) and Thomas Bosancic (4) – progressed to the quarterfinals with straight sets victories.

Third seed Michael Shepheard was eliminated in the first round on Wednesday.

> view the boys’ 16/u Australian Championships draw

Also moving into the last eight were No.5 seed Connor Di Marco and No.6 seed Campbell Salmon, straight sets winners over Tom Evans and Tristan Schoolkate respectively.

In 12/u action, Amor Jasika – younger brother of Australian pro Omar, who is through to the semifinals of the AO Play-off – won his third-round match at Melbourne Park on Thursday.

Jasika’s 6-3 6-3 win over Billy Bougoure sets up a quarterfinal showdown with top seed Alec Braund, a 3-6 6-1 6-4 victor over Doni Gashi.

> view the boys’ 12/u Australian Championships draw

> view the girls’ 12/u Australian Championships draw

In the girls’ 12/u Australian Championships, Charlotte Kempenaers-Pocz, Catherine Aulia, Hana Sonton, Talia Gibson and Mia Repac – the top five seeds – sealed places in the quarterfinals.

Only No.5 seed Repac was extended to three sets; she beat Jessica-Jade Haylo, the No.9 seed, 6-4 2-6 6-4.

For more information, visit the December Showdown homepage.