Nick Kyrgios took a cheeky dig at his critics after tickets for Friday's practice match with Serb Novak Djokovic sold out in 58 minutes, proving the Australian's huge box office draw.

Novak Djokovic dug deep to save a match point on the way to a 6-7(8) 7-6(3) 6-4 victory over Sebastian Korda in the Adelaide International 1 final on Sunday ahead of this month's Australian Open.

Aryna Sabalenka fired an Australian Open warning shot Sunday by winning her first title since 2021 at the Adelaide International, beating rising Czech teenager Linda Noskova 6-3, 7-6 (7/4).

Unheralded Czech teenager Linda Noskova stunned world number two Ons Jabeur Saturday to make her first-ever final at the Adelaide International, dealing the Tunisian a demoralising blow ahead of the Australian Open.

World number five Aryna Sabalenka surged into the final of the Adelaide International Saturday, crushing Romanian veteran Irina-Camelia Begu for the loss of just five games.

US Open champion Carlos Alcaraz said on Friday he will miss the Australian Open, the first Grand Slam of the season, after injuring his right leg in training.

Sania Mirza, India's former doubles world number one, said she will call time on her career aged 36 after next month's Dubai Tennis Championships, after her 2022 retirement plans were delayed due to injury.

The International Tennis Federation Asia Under-14 Development Championship will get underway on Sunday at the Sheikh Jamal National Tennis Complex in Ramna with 34 players from 10 countries taking part in the competition.

Former world number one Daniil Medvedev set up an Adelaide International semi-final against either Novak Djokovic or Denis Shapovalov Friday with a command performance in the countdown to the opening Grand Slam of the year.

Iga Swiatek was left in tears after Jessica Pegula stunned the world number one on Friday to give the United States a 1-0 lead over Poland in the semi-finals of the inaugural United Cup.

Novak Djokovic said "it is what it is" Thursday as he faced the prospect of missing more tournaments in the United States over his refusal to have a coronavirus shot.

Former world number one Daniil Medvedev locked in an all-Russian Adelaide International quarter-final with Karen Khachanov Wednesday, while Aryna Sabalenka stormed back to book her place in the last eight.

Novak Djokovic swept to victory in his first singles match on Australian soil since being deported a year ago, crushing Constant Lestienne at the Adelaide International on Tuesday to kick-start his bid for another Grand Slam title.

World number two Rafael Nadal slumped to a second-straight defeat at the United Cup Monday in a setback to his Australian Open preparations, but Stefanos Tsitsipas and Iga Swiatek were both on song.

Tennis fans gave Novak Djokovic a raucous welcome during his first match in Australia in almost two years when he made a rare doubles appearance at the Adelaide International on Monday.

Daniil Medvedev on Sunday admitted he would rather be playing at the mixed teams United Cup than the Adelaide International, but the Russian intends to make the most of the season-opening event.

Rafa Nadal brushed off talk of retiring anytime soon after the 22-times Grand Slam champion was stunned by Cameron Norrie in the United Cup mixed team tournament on Saturday, saying he still enjoyed competing at the highest level.

Rafael Nadal lost his opening match of the season Saturday in the countdown to the defence of his Australian Open title, but women's world number one Iga Swiatek cruised to victory at the United Cup.

Nick Kyrgios said he withdrew from the inaugural edition of the United Cup to be in peak condition for next month's Australian Open, adding that he did not expect everyone to understand the reasoning behind his decision.

Novak Djokovic admitted Thursday that being deported from Australia was an experience he will never forget, but it was time to move on, as he enjoyed a warm welcome in Adelaide.