Novak Djokovic is unlikely to play at the Australian Open if rules on COVID-19 vaccinations are not relaxed, the world number one's father, Srdjan Djokovic, said.
Organisers of the year's first Grand Slam have said that all players will have to be vaccinated to take part.
Djokovic has so far declined to disclose whether he is vaccinated and his father told Serbia's TV Prva that governing body Tennis Australia's stance on players being vaccinated was tantamount to "blackmail".
"As far as vaccines and non-vaccines are concerned, it is the personal right of each of us whether we will be vaccinated or not. No one has the right to enter into our intimacy," news website B92 quoted Srdjan as saying.
"Under these blackmails and conditions, (Djokovic) probably won't (play). I wouldn't do that. And he's my son, so you decide for yourself."
Djokovic has won nine Grand Slam titles at Melbourne Park, including this year's tournament, and shares the record of 20 men's Grand Slam titles with Roger Federer and Rafa Nadal.
Nadal has confirmed he will play at Melbourne Park in January but Federer will miss the tournament as he recovers from another knee surgery.
Sherfane Rutherford struck an unbeaten half-century and Gudakesh Motie produced a brilliant display of spin bowling as West Indies thumped England by 30 runs in a Twenty20 World Cup Group C encounter on Wednesday.
Australia launched their Twenty20 World Cup campaign with a commanding 67-run victory over Ireland in Colombo on Wednesday, powered by four-wicket hauls from Nathan Ellis and Adam Zampa.
Tottenham Hotspur have sacked manager Thomas Frank after eight months in charge, the Premier League club said on Wednesday, after a woeful run of results left the north London club hovering five points above the relegation zone.
South Africa survived Kagiso Rabada's final-over meltdown against Afghanistan and then a double Super Over drama before prevailing in a heart-stopping Group D match of the Twenty20 World Cup on Wednesday.
Pakistan opener Sahibzada Farhan has hit a swift half-century as the 2009 champions comfortably beat the US by 32 runs on Tuesday, clinching their second straight Group A win in the Twenty20 World Cup.
The UAE's Federal Authority for Government Human Resources has announced the official working hours for federal entities during the holy month of Ramadan.
His Highness Sheikh Mohammed bin Rashid Al Maktoum, Vice President and Prime Minister of the UAE and Ruler of Dubai, attended the final day of the seventh UAE SWAT Challenge at the Al Ruwayyah training ground in Dubai.
The UAE has chaired an emergency meeting of the Arab League in Cairo to address recent Israeli decisions to expand settlements in the Palestinian territories.