ROME (REUTERS) - Italy's world No. 7 Matteo Berrettini has thrown his support behind the decision to make Covid-19 vaccinations mandatory for players at January's Australian Open.

In November, tournament chief Craig Tiley said all players competing at the first Grand Slam of 2022 must be fully inoculated, following months of negotiations between Tennis Australia and the Victoria state government.

"I have been vaccinated and from that moment things have got better. I think that the request of the Australian government is sensible," Berrettini told Italy's Sportface website on Monday (Dec 13).

The measure has thrown the involvement in the tournament of Serbia's Novak Djokovic into doubt, as the world No. 1 has yet to disclose his vaccination status.

But Berrettini backed the decision, after having to quarantine for two weeks in a hotel in the lead-up to this year's Australian Open.

"We tried out something difficult. I would not wish two weeks of quarantine, like we had in 2021, on anyone," he said.

"For me, getting vaccinated is the right thing to do to get the world going again."

The 25-year-old had to withdraw from last month's ATP Finals through injury, but confirmed he will return for the season-opening ATP Cup in Sydney and Australian Open in Melbourne.