(All times AEDT)

Ken Rosewall Arena, Sydney

Group F: [10] Netherlands def [14] Norway 2-1

A Rus def M Helgo 7-6 (4), 6-1
T Griekspoor def by C Ruud 6-3, 6-4
D Schurrs/W Koolhof def U Eikeri/C Ruud 7-6, 7-5

Group D: [12] Italy v [16] Germany

J Paolini def A Kerber 6-4 7-5
L Sonego def by A Zverev 6-7 6-3 6-4
A Moratelli/F Cobolli v L Siegemund/M Marterer

RAC Arena, Perth

Group E: [5] Czech Republic def by [9] China 0-3

J Lehecka def by Z Zhang 5-7 6-3 6-4
M Vondrousova def by Q Zheng 6-1, 2-6, 6-1
M Vondrousova/J Lehecka def by Q Zheng/Z Zhang 6-1 6-2

Group A: [1] Poland def Brazil 2-0

I Swiatek def B Haddad Maia 6-2 6-2
H Hurkacz def T Seyboth Wile 6-7 (4), 6-2, 6-3
I Swiatek/H Hurkacz v B Haddad Maia/M Melo

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