Defending champion Novak Djokovic will bid for a record-extending 11th title at Melbourne Park and 25th Grand Slam crown overall.
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
A calm Sloane Stephens picked her shots to perfection to overcome Japan's Naomi Osaka in a battle between the last two US Open champions at the WTA Finals on Monday before top seed Angelique Kerber was upset by Kiki Bertens.
Naomi Osaka continued her stunning run of form with a 6-3, 6-2 victory over 23-times Grand Slam champion Serena Williams in the first round of the Miami Open on Wednesday, the latest big win for the 20-year-old Japanese player.
Serena Williams squandered four match points and blew a 5-1 lead in the decider to fall to seventh seed Karolina Pliskova 6-4 4-6 7-5 in the quarter-finals of the Australian Open.
Former world number one Maria Sharapova lost her second consecutive first round match with a 6-4, 6-4 defeat to Japan's Naomi Osaka at the BNP Paribas Open in California on Wednesday.
Former India batsman Mohammad Kaif said that players in individual sport like tennis should be allowed to avoid media if they are struggling mentally.
'I am still hungry for running in the Olympic Games and winning a gold medal, so I still feel fresh every time I wake up.'
Serena Williams had to dig deep to fend off Latvian challenger Jelena Ostapenko as she wrapped up Friday's play at the Fed Cup in Seattle with a hard-fought victory that gave the United States a 2-0 advantage. Williams' experience and savvy ways showed in critical moments against the 22-year-old Ostapenko as she prevailed 7-6(4), 7-6(3) in a match that took one hour and 46 minutes.
Former Australian Open runner-up Petra Kvitova said on Monday she is expecting her first child with husband and long-time coach Jiri Vanek and would miss the year's first Grand Slam which begins in two weeks.
Williams has just one professional tournament remaining before she drops the curtain on her historic career
Opelka, Kyrgios included in Team World for Laver Cup.
IMAGES from Day 1 of the Wimbledon Championships, at the All England Lawn Tennis and Croquet Club, London, on Monday.
As the fans head toward Flushing Meadows, tennis stars gear up with ground-breaking styles to rule the courts.
Looking to improve her claycourt skills, she spent a bit of time at 11-time French Open champion Rafael Nadal's academy.
Images from Day 1 of the Australian Open in Melbourne on Monday.
Naomi Osaka's total is the most ever earned by a female athlete in a 12-month period.
Naomi Osaka settled her nerves and stepped up her preparations for the Australian Open by beating Alize Cornet 6-2, 6-2 to reach the last 16 of the Gippsland Trophy warm-up tournament in Melbourne on Tuesday.
Images from Day 6 of the US Open in New York, on Saturday.
World number one Naomi Osaka was beaten in her opening match at the Dubai Duty Free Tennis Championships on Tuesday, losing to France's Kristina Mladenovic 6-3, 6-3 on her return to competitive action after winning last month's Australian Open.
The 21-year-old Japanese was scheduled to face sixth seed Kiki Bertens after coming through two matches on Thursday in the rain-affected tournament but said she was forced to withdraw due to pain and swelling at the base of her thumb.
A look at the records of Czech Republic's Karolina Pliskova and Japan's Naomi Osaka before their semi-final match at the Australian Open on Thursday (prefix number denotes seeding):
Already a sporting icon, Osaka's fight for equality has focussed even more attention on her
Japan has extended a state of emergency in Tokyo and three other areas until the end of May as the country battles a surge in COVID-19 cases
Naomi Osaka trying to move on from 'bittersweet' maiden Grand Slam title
Coco Gauff claimed the biggest win of her young career on Friday with a stunning upset of defending champion Naomi Osaka at the Australian Open to reach the fourth round. Caroline Wozniacki and Serena Williams also lost their respective matches earlier in the day. Images from Day 5 of the Australian Open played at Melbourne Park on Friday.
Images from Day 3 of the 2022 Australian Open in Melbourne on Wednesday.
Images from Day 2 at the US Open played at Flushing Meadows in New York on Tuesday
A difficult few months saw her fail to win a tournament, lose her number one ranking and crash out of Wimbledon in the first round.
Naomi Osaka faces Zheng before possible meeting with Coco Gauff
Ukrainian second seed Elina Svitolina ended Naomi Osaka's remarkable recent run with a 6-4, 6-2 triumph over the Indian Wells champion in the second round of the Miami Open on Friday.
Aryna Sabalenka is the red-hot favourite at Melbourne Park, where another victory would give her a fourth major title and widen the gap in the rankings to Poland's Iga Swiatek and Coco Gauff of the United States.
Daniil Medvedev and Karen Khachanov crushed second seed Dominic Thiem and third seed Alexander Zverev respectively to set up an all-Russian semi-final at the Rogers Cup in Montreal on Friday.
IMAGES from Day 2 of the US Open played at Flushing Meadows in New York on Tuesday.
Japan rallies to support Osaka after French Open withdrawal.
Twitter lit up with reactions after Naomi Osaka defeated the American in a stormy final on Saturday:
With rain having washed out Wednesday's play, Federer along with champion Rafael Nadal and top seed Novak Djokovic all face playing back-to-back matches on Thursday if they want to reach the quarter-finals.
Naomi Osaka eased into the second round of the Italian Open on Monday with a 6-0, 6-3 victory over former world number one Victoria Azarenka, on a day in which local favourite Roberta Vinci called time on her career.
IMAGES from Day 5 of the 2020 US Open in New York on Friday.
IMAGES from the Australian Open matches played on Friday.