Twenty-time Grand Slam champion Roger Federer will not compete at the 2021 Australian Open, having not fully recovered from knee surgery.

, with his last match coming at the 2020 Australian Open - a semi-final defeat to eventual champion Novak

Djokovic of Serbia."

Tickets for the Australian Open have gone on sale with organisers initially looking to fill 25 per cent of the capacity of their three main show courts.

Open was the only one of the four Grand Slams not to be impacted by the coronavirus crisis.Serbia's Novak

Djokovic and Sofia Kenin of the United States won the men's and women's titles respectively on Melbourne's

Poland's history-making French Open champion Iga Świątek and Russia's rising star Andrey Rublev were among the prize winners as the Women's Tennis Association (WTA) and the Association of Tennis Professionals (ATP) held their annual awards.

doubles honour was won by British duo Jamie Murray and Neal Skupski.The ceremony also celebrated Serbian Novak

Djokovic and doubles pairing Mate Pavić of Croatia and Brazilian Bruno Soares after they finished the

The Australian Open has been pushed back three weeks with the men's qualification event moved to Doha in Qatar due to the coronavirus pandemic, it has been confirmed.

Open was the only one of the four Grand Slams not to be impacted by the coronavirus crisis.Serbia's Novak

Djokovic and Japan's Naomi Osaka won the men's and women's titles respectively on Melbourne's hard courts.Wimbledon

Tennis Australia received AUD4.5 million (£2.6 million/$3.4 million/€2.8 million) in Government support this year because of the financial impact of the coronavirus pandemic as it continues with plans to organise the Australian Open in its rearranged February slot.

Australian Open will run from February 8 to 21 to incorporate a period of quarantine for players.Novak Djokovic

Open was the only one of the four Grand Slams not to be impacted by the coronavirus crisis.Serbia's Novak

Djokovic and American Sofia Kenin won the men and women's title respectively on Melbourne's hard courts

Andrey Rublev and Diego Schwartzman were the two new names in the top ten of the year-end Association of Tennis Professionals (ATP) world rankings.

Argentina's Schwartzman placed ninth in the world, having made the final of the Italian Open where he lost to Novak

Djokovic.

 Djokovic topped the end of year world rankings for a record-equalling sixth time.The Serbian previously

 This year, Djokovic earned a record eighth Australian Open and 17th Grand Slam title in February.He

 It has also been a controversial year for Djokovic, however.

Next year's Australian Open will reportedly take place from February 8 to 21 to incorporate a period of quarantine for players.

 Serbia's Novak Djokovic was the winner of the men's competition at the 2019 Australian Open ©Getty

Open was the only one of the four Grand Slams not to be impacted by the coronavirus crisis.Serbia's Novak

Djokovic and Japan's Naomi Osaka won the men and women's title respectively on Melbourne's hard courts.Wimbledon

Two-time Olympic champion Andy Murray has said he would love to compete at Tokyo 2020, with the British star listing the Games among his priorities for 2021.

Earlier this year world number one Novak Djokovic said he would "have to make a decision" if a vaccination

vaccination and I wouldn’t want to be forced by someone to take a vaccine in order to be able to travel,” Djokovic

Russian tennis player Karen Khachanov has revealed that he has tested positive for COVID-19 after flying to the United Arab Emirates for pre-season training.

Tennis Professionals Masters 1000 title after a straight sets victory over Serbia's world number one Novak

Djokovic in the final of the Paris Masters in 2018.He is one of many tennis players to test positive

for the virus, including Djokovic, who contracted COVID-19 during the Adria Tour.During the tournament

Daniil Medvedev came from behind to beat Dominic Thiem and win the Association of Tennis Professionals (ATP) Finals in London - the biggest win of his career to date.

defeated Spain's 20-time Grand Slam champion Rafael Nadal in the semi-finals and overcome world number one Novak

Djokovic of Serbia - a five-time winner of this event - in the group stage.Medvedev is also the last

meet in the Association of Tennis Professionals (ATP) Finals final after seeing off Rafael Nadal and Novak

Djokovic respectively.

 Thiem also needed three sets to reach the final, and his clash with Serbian world number one Djokovic

The 2021 Australian Open could be postponed after concerns were raised over tennis players' ability to arrive in Australia and complete the mandatory quarantine period before the Grand Slam.

Australian Open has been postponed by tournament directors due to COVID-19.Serbia's world number one Novak

Djokovic, Germany's Alexander Zverev and Brazil's Bruno Soares have all stated their opposition to current

Novak Djokovic beat Alexander Zverev in their winner-takes-all match to book the last place in the Association

World number one Djokovic triumphed 6-3, 7-6 (7-4), holding his serve throughout.Serbia's Djokovic is

a five-time winner of the ATP Finals, but not since 2015.Djokovic will play Austrian Dominic Thiem in

the semi-finals.The defeat for Zverev brings his season to a close, and Djokovic was asked about the

sincerely wish for him that he overcomes this soon and that he can focus on his life and tennis career," Djokovic

pic.twitter.com/4xs86RpK1R— Novak Djokovic (@DjokerNole) November 20, 2020The other singles match played

Rafael Nadal is through to the Association of Tennis Professionals (ATP) Finals last four following a three-set win over Stefanos Tsitsipas in London.

and converted four as he won 6-2, 7-5 to ensure his season ended on a winning note.World number one Novak

Djokovic and Alexander Zverev are to face off tomorrow to decide who plays Thiem.German Zverev was the

ATP Finals champion in 2018, while Serbia's Djokovic is a five-time winner, but not since 2015.

Daniil Medvedev beat Novak Djokovic in straight sets to reach the last four of the ATP Finals in London

The Russian comprehensively outplayed world number one Djokovic and at one stage won seven consecutive

Djokovic's three.With two wins from two, Medvedev is guaranteed to win the group, named Tokyo 1970.Djokovic

Some inspired tennis from @DaniilMedwed against Djokovic!

Schwartzman of Argentina.Zverev triumphed 6-3, 4-6, 6-3 as Schwartzman was eliminated.The winner of the Djokovic-Zverev