Lest we forget, this year’s Australian Open has reminded us of those unwritten rules.

Relive the biggest moments in Australian Open history, from Nadal's legendary 2022 comeback to Collins' viral 2025 showdown.

MELBOURNE – The Australian Open, the first Grand Slam of the year, ended on Sunday, when defending champion Jannik Sinner beat Alexander Zverev for the men’s title. AFP looks back on five memorable storylines from the past two weeks in Melbourne:

Australian Open boss Craig Tiley has defended the crowd behaviour at this year's tournament after it was placed firmly under the microscope during the 15-day event.

Analysis - It's local supporters at the Australian Open who have been the worst behaved, with actions like booing Novak Djokovic after his shock injury retirement, says tennis writer Dave Worlsey.

Hosting one of the four grand slams is a fragile privilege. It’s under ever-growing threat from ambitious and cashed-up rivals.

The sight of Novak Djokovic walking into the Rod Laver Arena players’ tunnel chased by boos is the moment the host country crossed the line.

Australian Open finalist Alexander Zverev immediately jumped to Djokovic’s defence after the incident, which drew widespread condemnation from the tennis world as former slam quarter-finalist John Millman declared it a “disgrace” on social media.

“It’s fun in Australia. It’s a place where you see people coming from all over the world, which creates a great atmosphere. Sometimes, I think ... it can go a little bit over the line. There are traditions in tennis that are important that make tennis unique,” said Patrick McEnroe, an ex-player and former captain of the US Davis Cup team.

Why is everyone so angry at what long has been known as the Happy Slam? Things are a little out of control at the Australian Open this year, and that’s got only a little to do with the results on the courts.

Fred Lee/Getty American Tennis Player Danielle Collins Thanks Booing Australian ... “But you’ve got to understand Novak Djokovic is someone who has given this sport for the past 20 years ...

Novak Djokovic has taken to social media to ... including booing players and cheering their errors when playing against Aussies. Danielle Collins was booed when playing Destanee Aiava, while ...