MELBOURNE, Jan 19 — Erratic title contender Coco Gauff and three-time finalist Daniil Medvedev reached the Australian Open second round Monday ahead of a defiant Novak Djokovic launching his latest bid to win a record 25th Grand Slam crown.

A bumper day two at the season-opening Grand Slam also sees six-time major winner Iga Swiatek, home hope Alex de Minaur and fourth seed Amanda Anisimova enter the fray.