De Groot eased past Shuker at Melbourne Park, defeating her opponent 6-0, 6-0 in just 38 minutes.

The defending champion will now play compatriot Marjolein Buis in the semi-final, who beat Germany's Sabine Ellerbrock 6-1, 6-4. 

The competition's second seed, Japan's Yui Kamiji, had a tougher challenge against Italy's Guilia Capocci, eventually winning 7-6, 6-3.

She will face Aniek van Koot of The Netherlands in the next round, after the Dutch player defeated South Africa's Kgothatso Montjane 6-1, 7-5.

The defending champion in the men's competition was also successful. 

Japan's Shingo Kunieda was facing Great Britain's Alfie Hewett in the opening tie, in what was a rematch of last September's US Open final.

Kunieda reversed the outcome of that match, beating Hewett 6-1, 6-4.

The Japanese player will now meet Stefan Olsson in the semi-finals after the Swede defeated his doubles partner Joachim Gerard 6-4, 6-3.

World number two, Gustavo Fernandez of Argentina, comfortably won against wildcard Ben Weekes of Australia 6-1, 6-1.

Fernandez will play France's Stephane Houdet in the semis, who eventually beat Britain's Gordon Reid 7-6, 5-7, 6-2. 

In the quad singles event, world number one Dylan Alcott of Australia defeated compatriot and wildcard Heath Davidson 6-3, 6-2.

David Wagner of the United States needed three sets to overcome Britain's Andy Lapthorne 6-1, 4-6, 6-4. 

All four quads players are competing in a round-robin.