'A happy Slam' Roger Federer and Serena Williams among entries for Australian Open

World No 1s Djokovic and Barty will also head for Melbourne

Switzerland's Roger Federer in action during the 2020 Australian Open. He will return to Melbourne in February. AFP

Roger Federer and Serena Williams were among the entries announced on Thursday for the coronavirus-disrupted Australian Open, with tournament director Craig Tiley vowing a "happy Slam" after months of painstaking planning.

All the world's top players have signed on, led by world No 1s Novak Djokovic and Ashleigh Barty.

There was a question mark over Swiss great Federer, who warned this month he was in a "race against time" to be fit after two rounds of knee surgery.

But he has started training in Dubai and was among those entered to play at Melbourne Park as he targets a seventh title.

US superstar Williams, who like Federer turns 40 next year, is also committed as she once again attempts to pull level with Margaret Court as a 24-time Grand Slam champion.

Her last triumph at the majors came in Australia in 2017 when she was pregnant.

"There are so many great storylines for AO 2021," said Tiley.

"Serena is gunning for her eighth title while Novak, who often seems invincible at Melbourne Park, is going for a record ninth title.

"Our own world No 1 Ash Barty will return to Grand Slam competition, as will Roger Federer as he comes back from injury."

The opening Grand Slam of the year, which will be played in front of at least 50 per cent of normal crowds, has been pushed back three weeks until February 8.

All players must undergo a mandatory 14-day quarantine on arrival, during which they will constantly be tested for Covid-19 but allowed to train for five hours a day in a bio-secure bubble.

"Although the AO will look a bit different to previous years, the safety of everyone is our top priority," said Tiley.

"We have the opportunity to stage a very safe, and happy Slam, and give the players the experience of competing in front of crowds again, something they've missed for most of this year."

The men's and women's qualifiers will be held in Doha and Dubai respectively from January 10-13, with players arriving in Melbourne from January 15 on special charter flights.

A slimmed-down, 12-team ATP Cup, the relocated Adelaide International, and a ATP 250 tournament will all be played in Melbourne once players are out of isolation.

Two WTA 500 tournaments are also planned to be held concurrently at Melbourne Park on January 31-February 7.