The duo reached the mixed doubles semi-finals together with Pilley repeating the feat in the men's event.

In the women's tournament Lobban also remained undefeated to stay at the top of the round-robin pool at the Carrara Squash Centre.

In the mixed doubles Pilley and Lobban, the reigning Commonwealth Games champions and top seeds, defeated compatriots Christine Nunn and Ethan Eyles 11-4, 11-5 to top Pool A.

They have set-up a meeting with third-seeded Australians Alex Haydon and Zac Alexander who finished second in Pool B after their 11-5, 11-7 win over Malta's Colette and Kijan Sultana.

Nunn and Eyles have still advanced as Pool A runners-up and will play Pool B winners and second seeds Catalina Pelaez and Matias Knudsen of Colombia, who defeated Filipinos Aysah Dalida and Reymark Begornia 11-3, 11-9 today.

In the men's draw, Pilley teamed up with Ryan Cuskelly to finish top of Pool A with a fourth win from four.

The top seeds and defending champions beat fellow Australians Nick and Tom Calvert 11-5, 11-4.

It was a disappointing day for the Calvert brothers who also lost 11-1, 11-4 to Jean-Pierre Brits and Christo Potgieter, a result which effectively saw the South Africans through as Pool A runners-up at their expense.

Brits and Potgieter have self-funded their trip to Gold Coast.

Pool B saw second seeds Alexander and Rex Hedrick maintain their 100 per cent record as they beat Andres Herrera and Juan Vargas of Colombia 11-8, 11-6 to finish top.

The Colombians had earlier won in three against Malaysians Darren Chan and Brian Lim, 9-11, 11-9, 11-6, and finished as runners-up to also make the last four.

Pilley and Cuskelly will face Herrera and Vargas in the semi-finals with Alexander and Hedrick up against Brits and Potgieter.

In the women's event, which is a five-team round-robin competition, Lobban and Nunn recorded a third win from as many matches as they beat Jemyca Aribado and Dalida of The Philippines 11-7, 11-3.

Their compatriots Sarah Cardwell and Jessica Turnbull are their nearest challengers, winning both of their contests and boasting a match in hand.

They defeated compatriots Taylor Flavell and Selena Shaikh 11-9, 11-7 today.

Tomorrow sees the mixed and men's semi-finals as well as the penultimate round of women's matches.