Venus Williams swept aside Germany’s Mona Barthel to reach the quarter-finals for the Australian Open for the seventh time.

The 36-year-old seven-time Grand Slam champion won 6-3 7-5 in Melbourne.

Williams – the oldest player in the women’s singles – next faces Anastasia Pavlyuchenkova, who beat fellow Russian Svetlana Kuznetsova 6-3 6-3.

World number one and defending champion Angelique Kerber plays American Coco Vandeweghe later on Sunday.

The winner will face Spanish seventh seed Garbine Muguruza, who beat Romanian Sorana Cirstea 6-2 6-3.

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