Djokovic, Halep top seeds at Australian Open

World number ones Novak Djokovic and Simona Halep were named top seeds on Thursday for next week's Australian Open, with 23-time major winner Serena Williams lurking at 16 on the women's side.

Djokovic heads long-time rival Rafael Nadal and defending champion Roger Federer, with young-gun Alexander Zverev seeded four as he targets a maiden Grand Slam title.

The Serbian world number one is aiming to make history by claiming a record seventh Australian Open crown when the tournament starts at Melbourne Park on Monday, as is Swiss legend Federer.

The pair face a stern challenge from Zverev, the torch-bearer for the next generation who has so far failed to get beyond the quarter-finals at any major.

With world number five Juan Martin del Potro missing through injury, South Africa's Kevin Anderson is elevated to fifth seed with last year's beaten finalist Marin Cilic at six.