US teenager Coco Gauff has beaten Venus Williams in Australian Open first round, their second encounter in a Grand Slam.

The 15 year-old American held her nerves to overcome veteran 39 year-old Venus in the first tie breaker, winning 7-6(7-5) and then raced away in the second set, to clinch it 6-3. She similarly beat Venus at the Wimbledon last year.