Images from Day 2 of the 2022 Australian Open in Melbourne on Tuesday.
Novak Djokovic beat Daniil Medvedev in the US Open final to win a 24th Grand Slam singles title and equal Margaret Court's record haul.
But the top seed targeted world number 68 Niemeier's serve to grab the decisive break and with it the opening set, before surrendering serve early in the next only to hit back from 2-0 down to level at 5-5 before going on to seal the victory.
Kristina Mladenovic and Ivan Dodig swept to a 6-3, 6-4 victory
Djokovic left little doubt that he would also be there trying to win major number 23.
Emma Raducanu says she is not worried about her poor form and will play without pressure at the Australian Open.
Aryna Sabalenka rose above geopolitical tumult to become the first player to claim a Grand Slam title as a neutral at the Australian Open.
Spain's Paula Badosa, the women's world number 67, was the only player to contract the coronavirus. She was released from hotel quarantine on Wednesday.
Twelve months on and things have not got any easier for Tennis Australia with Omicron spreading through the country just as the first players are set to arrive for warm-up events ahead of the Melbourne Park tournament.
Novak Djokovic cruised through his first singles match in Australia since being deported last year.
World No 1 Novak Djokovic began practice on Friday, January 14, 2022, to pursue a record 21st Grand Slam title at the Australian Open in Melbourne, which begins on Monday, January 17.
Rafael Nadal confirmed he will miss this year's French Open as he is yet to recover from injury.
He will start his 2022 season in South America at the Cordoba Open in Argentina at the end of January.
The win is the Czech duo's fourth Grand Slam title together
Djokovic has declined to disclose whether he is vaccinated, citing privacy.
The Australian was warned for bad language and docked a point for unsportsmanlike conduct after throwing his racquet into the stands during Friday's 6-3, 6-4 defeat by Borna Coric in the Murray River Open at Melbourne Park.
Serena Williams was included on the entry list for the US Open on Wednesday along with fellow former champion Novak Djokovic, who will not be able to compete due to his refusal to be vaccinated against COVID-19.
Stefanos Tsitsipas feels he is unfairly targetted by officials over on-court coaching and said that it should be allowed anyway, after his Australian Open semi-final loss to Daniil Medvedev on Friday.
Australian Open chief Craig Tiley is confident Rafael Nadal will be at Melbourne Park for next month's Grand Slam despite testing positive for COVID-19, but he is still uncertain whether Novak Djokovic will be playing.
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 be nowhere near the centre court after losing his bid to overturn a second visa cancellation.
Novak Djokovic is prepared to miss the French Open and Wimbledon if COVID-19 vaccination becomes mandatory at the Grand Slams but he is not against inoculation, the world number one tennis player said.
On Sunday, Rafael Nadal's extraordinary resilience was on full display as he closed out a marathon five-setter against World No 2 Daniil Medvedev.
Victoria, of which Melbourne is the capital, reintroduced the compulsory wearing of masks in indoor public places from Thursday while private gatherings were reduced from 30 people to 15.
Images from Day 1 of the French Open matches played at Roland Garros on Sunday.
Carlos Alcaraz moved to within two wins of completing the 'Sunshine Double'
Danielle Collins spoke of the challenges of plotting matches without a coach but will still head off with lessons learnt.
Nick Kyrgios said he pulled out of the Sydney Tennis Classic after testing positive for COVID-19
Take a look at six of the up-and-comers who could upset the top names at the year's first Grand Slam.
Images from Day 3 of the 2022 Australian Open in Melbourne on Wednesday.
Security officials promptly made a human shield around the players as some others dragged the person
Trailblazing India tennis star Sania Mirza's swansong appearance at the Australian Open ended with a quarter-final loss to local pair Jaimee Fourlis and Jason Kubler in the mixed doubles in Melbourne on Tuesday.
Players competed at empty stadiums at Melbourne Park through the five-day lockdown but reduced capacity crowds of 7,477 have been permitted in each of Thursday's two sessions and the same number for the singles finals sessions on Saturday and Sunday.
Here are images from a hot, hot day from Melbourne Park...
Nadal said he did not expect to go all the way at Melbourne Park
Barty is primed to become the first local since Chris O'Neil in 1978 to win the Australian Open.
At one stage, police deployed pepper spray.
The 33-year-old, a record eight-time winner on the Melbourne Park Arena, slipped during the third set of Friday's third-round match against Taylor Fritz and disappeared off Rod Laver Arena for treatment.
Djokovic practised his serves and returns with his entourage on an empty court at Melbourne Park