Johanna Konta lost her first match since withdrawing from the Australian Open following a straight-sets defeat to Shelby Rogers at the Adelaide International.
The British number one was forced to curtail her participation at the opening major of the year midway through her first-round clash against Kaja Juvan with an abdominal injury.
And on her return to action, the third seed was comfortably outplayed by the in-form Rogers, who won 6-2 6-2 in one hour and 12 minutes to book her place in the last eight.
It marks a further setback for Konta, 29, who endured a troubling 2020 campaign due to ongoing issues with a knee injury.
Speaking on court after the match, American Rogers, who reached the fourth round of the Australian Open, said: “I started the match really well with a quick break and I kept the momentum going.
“I knew I had to bring my best game for Jo, who can serve you off the court whenever she wants. I was very happy with my return game tonight and I am excited to be in the quarter-finals.”
Rogers awaits the winner of Coco Gauff’s last-16 clash with sixth seed Petra Martic.
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