Withdrawal

With Vanuatu already out of the tournament in Qatar, Thursday's clash between Solomon Islands and Tahiti in Doha will now act as a single play-off match to determine the winner and runner-up of Group A, with both teams already assured of a spot in the semi-finals.

If the match is level at the end of 90 minutes, extra time will be played followed by penalties if required.

Regulations require any non-US citizen to have a Covid vaccination before entering the country.

Serb Djokovic, 34, told the BBC last month that he had not been vaccinated.

The 20-time Grand Slam winner was included in the draw for both events, but has since posted on Twitter that he knew it was "unlikely" he could travel.

He is likely to make his return to the tour at the Monte Carlo Masters in April.

The Indian Wells draw will be less balanced following the late withdrawal of Djokovic, who was seeded second.

The large volcanic eruption and tsunami which struck on January 15 has caused widespread damage across much of Tonga and impacted over 80 percent of the population. 

Many in Tonga have had their homes badly damaged or destroyed and issues with basic necessities such as safe drinking water are likely to exist for the foreseeable future.  

The deal was signed in Nuku Alofa last year on 14 June by 10 countries including Australia, New Zealand, Niue, Samoa, Solomon Islands, Kiribati, Tuvalu, Cook Islands and Tonga.

But according to Matangi Tonga, 'Akilisi Pohiva has admitted that the agreement has been found to be inappropriate for Tonga and the country is no longer a signatory.

However, a spokesperson from Australia's Department of Foreign Affairs and Trade says Australia has not received any formal advice from Tonga that it is not proceeding towards ratification of the Treaty.