Former world number one Novak Djokovic's Australian Open preparations suffered a blow Friday as he was bundled out of the Brisbane International by towering American Reilly Opelka.

Novak Djokovic on Sunday called for more transparency around doping suspensions in tennis, saying high-ranked players appeared to be treated differently to others.

Top-ranked Aryna Sabalenka says she and key rival Iga Swiatek have developed a "chilled" relationship off court in contrast to their fierce battles on the big stage.

For over two decades, the "Big Three" of Roger Federer, Rafael Nadal, and Novak Djokovic dominated the sport, pushing each other to unimaginable heights. Now, a new story begins.

Zverev trails world number one Italian Jannik Sinner by more than 3,000 ranking points, but his confidence is high after winning the Rome and Paris Masters 1000 titles in recent months.

Novak Djokovic is confident he can still win Grand Slams, starting at the Australian Open, with the Serbian kickstarting his bid for an unprecedented 11th title and record 25th major crown in Brisbane this week.

Fraser, a former world number one and winner of 19 Grand Slam titles during the amateur era, died aged 91 earlier this month.

The former world number one lifted three major singles titles, including Wimbledon in 1960, together with 16 Grand Slam doubles crowns

Novak Djokovic is ready to challenge Jannik Sinner and Carlos Alcaraz at the Grand Slam stage when he returns to action at the Australian Open after an underwhelming campaign this year, the 24-times champion said.

Novak Djokovic said shared experiences with Andy Murray make the Scot the "perfect coach" as he bids to win a record 25th Grand Slam in Australia in January.

Romania's Simona Halep on Friday rounded on the International Tennis Integrity Agency (ITIA) for discrepencies in the treatment of world number two Iga Swiatek after testing positive for a banned substance.

"The player was provisionally suspended from Sept. 22 until Oct. 4, missing three tournaments, which counts towards the sanction, leaving eight days remaining," the ITIA said in a statement.

The world number one eased to a 7-6 (7/2), 6-2 triumph against Tallon Griekspoor for the winning point after Matteo Berrettini had put the defending champions ahead with a convincing 6-4, 6-2 win against Botic van de Zandschulp.

World number one Jannik Sinner was described as a "puzzle that not many have solved" after defeating Alex de Minaur to power holders Italy into the Davis Cup final with a 2-0 victory over Australia on Saturday.

Novak Djokovic announced on Saturday that his retired long-time rival Andy Murray is joining the 24-time Grand Slam-winning player's coaching team, starting at the Australian Open in January.

Sinner has so far managed fears that a ban might bring his career to a shuddering halt.

Italy booked a third consecutive return to the semi-finals and are favourites to win the Davis Cup for a second year running.

Australia defeated record 28-time Davis Cup winners the United States in a decisive doubles rubber on Thursday to reach the semi-finals with a hard-fought 2-1 victory.

The world number four enjoyed a stunning season, finishing as runner-up at Roland Garros and Wimbledon, winning her second career title in Dubai and then triumphing with Italy in doubles at the Olympics and again in Malaga.

A sparkling 2024 in which Aryna Sabalenka swept the hardcourt Grand Slams and clinched the year-end world number one ranking has left the powerful Belarusian dreaming of dominating the women's game as Serena Williams did for so long.