Aus Open: Federer, Serena start with easy wins on opening day

The 38-year old Federer eased past his rival 6-3, 6-2, 6-2 to kickstart his bid for a 21st Grand Slam title in style. He will next take on either French qualifier Quentin Halys or Serbian Filip Krajinovic.

Meanwhile, 13th seed Denis Shapovalov had a big row with the umpire for throwing his racquet in frustration as he lost his opener 6-3, 7-6 (9/7), 6-1, 7-6 (7/3) to Hungarian Marton Fucsovics in a big upset on day one.

In the women's matches, while Serena beat Potapova 6-0, 6-3 in 58 minutes, Naomi Osaka began her Australian Open title defence by dismantling unseeded Czech Marie Bouzkova. The 22-year-old Japanese, roared past her rival 6-2, 6-4 in 80 minutes.

Elsewhere, world number one and local girl Ashleigh Barty braved a scare before powering into the second round. The 23-year-old saw off Ukraine's Lesia Tsurenko 5-7, 6-1, 6-1.

Caroline Wozniacki also started with a good win as the 2018 champion beat Kristie Ahn 6-1, 6-3 to reach the second round.

American Coco Gauff, all of 15, got the better of Venus Williams - the second time the teenager has dumped the veteran out in a Grand Slam first round as she won 7-6 (7/5), 6-3.