Roger Federer, accompanied by his wife Mirka, was spotted in the Royal Box during the fourth-round match between Novak Djokovic and Alex de Minaur.
Djokovic saved three breakpoints in stifling conditions to go 5-4 up but lost the opening set in a tough tiebreak as Opelka cranked up his serve
The Australian Open will offer a record A$111.5 million ($74.73 million) in prize money this year and while players welcomed the increase, top names like Coco Gauff and Aryna Sabalenka said the push for a bigger payout must continue across the Grand Slams.
Top seed Carlos Alcaraz overcame Croatia's Marin Cilic to reach the round of 16 at the Qatar Open.
Serbia have been drawn in Group B alongside Spain, South Korea and Canada.
Novak Djokovic cruised through his first singles match in Australia since being deported last year.
Lorenzo Musetti faces seven-times Wimbledon champion Novak Djokovic in the semi-finals.
World number one Carlos Alcaraz arrives in Melbourne with only one mission in mind -- claim a first Australian Open title to become the youngest man to complete the career Grand Slam.
The Australian government cancelled Novak Djokovic's visa for a second time on Friday, saying the World No 1, unvaccinated for COVID-19, may pose a risk to the community.
World No 1 Djokovic on Sunday won his sixth Wimbledon title. With this win, Djokovic now has 20 Grand Slams to his name and he is now equal with Swiss tennis maestro Roger Federer and Nadal.
Novak Djokovic will prepare for a tilt at an 11th Australian Open title by representing Serbia at the United Cup mixed team tournament while old rival Rafael Nadal and former women's world number one Naomi Osaka return at Brisbane after time away.
Top seed Novak Djokovic produced a stellar display to sweep aside Croatian Marin Cilic 6-3, 6-4 in the final of the ATP 250 Tel Aviv Open on Sunday and clinch his third title of the season.
Images from the Olympics tennis action at the Roland Garros, Paris, on Wednesday.
'The only reason I come back is because of the love you (fans) give me'
Novak Djokovic is returning to the US for the first time in two years after being denied entry due to being unvaccinated for COVID-19.
Serbia's Novak Djokovic outclasses Russia's Andrey Rublev to set up a meeting with unseeded Tommy Paul in the semi-finals of the Australian Open on Wednesday.
The Serbian's 19th successive win ended any chance of Spain's Carlos Alcaraz overtaking him in the rankings this week.
Novak Djokovic said he is preparing for the US Open as if he will be allowed to compete at the hardcourt major, despite his refusal to take the COVID-19 vaccine.
Novak Djokovic dug out a 6-7(4) 6-1 6-4 win over Czech Jakub Mensik on Friday to advance to the semi-finals of the Shanghai Masters, where he will face Taylor Fritz.
The company is developing a peptide, which inhibits the coronavirus from infecting the human cell, expects to launch clinical trials in Britain this summer, he added.
Novak Djokovic won a record-extending 10th Australian Open crown, beating Stefanos Tsitsipas in a generational clash in the men's singles final, at Melbourne Park, on Sunday.
Djokovic struggled to find his range early in the contest as Spaniard Davidovich Fokina raced to lead
The 34-year-old is currently housed in a government detention hotel in the suburb of Carlton, 5 km (2 miles) north of Melbourne Park, after authorities cancelled his visa when he arrived in Australia.
Djokovic will next play Denis Shapovalov, who he has beaten in all seven of their meetings.
That decision opened a path for him to target a 10th title at the Grand Slam and tie Rafael Nadal's mark of 22 majors.
'The drive that I have is still there. My body has been serving me well, listening to me well. I have a great team of people around me. The motivation, especially for the biggest tournaments in the sport, is still present.'
Novak Djokovic and his wife Jelena have tested negative for COVID-19, nine days after returning a positive test, the world number one tennis player's media team said on Thursday. Djokovic, along with Grigor Dimitrov, Borna Coric and Viktor Troicki, tested positive after playing in the Adria Tour, an exhibition tournament organised by the 17-times Grand Slam champion.
World No 1 Novak Djokovic said Carlos Alcaraz is the man to beat on clay and is one of the top title contenders for the French Open.
Carlos Alcaraz and Aryna Sabalenka advanced to the semifinals of the Indian Wells tournament, along with Daniil Medvedev and Elina Svitolina, after a series of compelling matches.
Novak Djokovic has pulled out of the Serbia team for the ATP Cup in Sydney, event organisers said on Wednesday, raising further doubts over whether the world number one will defend his Australian Open title next month.
Legendary Andre Agassi said Carlos Alcaraz combines the best qualities of Novak Djokovic, Roger Federer and Rafael Nadal but cautioned the tennis world against expecting the Spaniard to repeat the incredible feats of the 'Fab Three.'
Sinner fired both team members last month, before winning the US Open title to make it two Grand Slam trophies in 2024 following his breakthrough Australian Open triumph.
The prize money pool for this year's U.S. Open has been increased by 15% to $75 million, making it the largest purse in tennis history, the United States Tennis Association announced on Wednesday.
The reaction has been swift across the world to Novak Djokovic's visa has been cancelled for a second time by the Australian government.
Novak Djokovic's outstanding serving, mighty forehand and all-court defence delivered him a ninth straight win over Stefanos Tsitsipas in their Red Group match.
Goran Ivanisevic, Djokovic's coach, was greeted with jeers from fans when he broke the news courtside.
Former world number one Novak Djokovic will miss the US Open after he said on Thursday that he will not be able to travel to New York for the tournament, having chosen not to be vaccinated against COVID-19.
World number one Novak Djokovic is considering going without a coach after 20 years in professional tennis, the Serb said after receiving the top men's honour at the Laureus awards.
Novak Djokovic missed two of this year's four Grand Slams due to not being vaccinated against the novel coronavirus but the Serbian said he has no regrets about his decision.
Novak Djokovic steered Serbia into the Davis Cup semi-finals with a straightforward 6-4 6-4 win over Britain's Cameron Norrie to give his team a winning 2-0 lead on Thursday.
