• Updates from the first day of quarter-finals at Melbourne Park
• Ash Barty plays a team game in singular pursuit of home glory
• Any thoughts? Email or tweet @mike_hytner

1.54am GMT

First set: Hsieh Su-wei 1-2 Naomi Osaka* (denotes server) Osaka holds again without too much ado, to love, and we’re still on serve early on this opening set. Remember, Osaka has the edge on head-to-heads: the Japanese leads 4-1 in the pair’s previous five meetings. But, the results mask how close those matches were.

1.52am GMT

First set: Hsieh Su-wei* 1-1 Naomi Osaka (denotes server) Hsieh, who has never before been this deep at a grand slam, is known for her unpredictability and she throws up a bit of funky stuff on her first service game today. All good for the Tawainese so far.