He's Tennys Sandgren. Even his name is intriguing. Playing for the first time in Melbourne at 26, the world No.97 hadn't won a match in his two previous main-draw appearances at the majors. Now he's in the final eight alongside Federer, Nadal, Berdych and Cilic.
Novak Djokovic is out. The six-time Australian Open winner, former world number one was betrayed by his body and brought down in straight sets by the relentlessness of Hyeon Chung. Novak Djokovic lost and won. Novak Djokovic lost but the man playing his game better than him won.
He's the bespectacled South Korean with lethal athleticism and nerves of steel. So who is rising sensation Hyeon Chung?
Novak Djokovic might need to take more time out of the game after the elbow injury that sidelined him for six months last year flared again and saw him dumped out of the Australian Open and uncertain of his immediate future.
Australia's Davis Cup hero Mark Philippoussis believes Nick Kyrgios must eventually turn to a coach in the pursuit of grand slam success, but only "on his terms and when he's ready".
The man who reaches the meaningful end of grand slams with monotonous regularity, has done it once again. Roger Federer has cast opponents to the wayside in reaching the Australian Open quarter-finals or better for a 14th time.
Madison Keys came into her fourth-round tie against eighth seed Frenchwoman Caroline Garcia as the last American standing in the women's draw.
It was enthralling, enrapturing, fascinating and nerve-racking.
Nick Kyrgios wanted to keep playing doubles at Australian Open but his partner Matt Reid put his foot down.
Britain's new tennis hero Kyle Edmund was asked if he can win the Australian Open. "You have to believe it," he replied.
Rafael Nadal's charmed grand slam run has come to an end as the world No.1 prepares to face his sternest big-stage test since his historic 10th French Open final triumph.
No.1 seed Simona Halep has returned to the Australian Open quarter-finals after comfortably winning her fourth-round encounter against Japanese youngster Naomi Osaka 6-3, 6-2 at Margaret Court Arena on Monday evening.
Hidden in one of the many labyrinthine passages underneath Melbourne’s Rod Laver Arena lies the players’ cafe.
This time a year ago, Nick Kyrgios was booed off court. Fast-forward a year and the feisty 22-year-old is a fan favourite.
Nick Kyrgios has been beaten in four sets by world number three Gregor Dimitrov.
After exiting the Australian Open, Nick Kyrgios says he has a clear vision for what he wants from tennis.
Big-serving sixth seed recorded his 100th win at grand slam events by beating 10th-seeded Spaniard Pablo Carreno Busta.
Australia's Lleyton Hewitt made the backwards cap definitively a thing in tennis, members of the new wave have acquired the taste, too.
Veterans Sam Groth and Lleyton Hewitt have breezed into the quarter-finals at the Australian Open, continuing their men's doubles farewell tour with a first-set walkover.
Caroline Wozniacki is back. She's back into an Australian Open quarter-final - as deep as she has been since 2012 - and she is back in contention to be the No.1 ranked player in the world.
Rafael Nadal will meet sixth-seed Marin Cilic in the quarter-finals, after grinding his way to a four-set victory against dogged 24th seed Diego Schwartzman.
For years the Australian Open has served up plenty of aces, volleys and rallies but the Cairns Taipans are planning on adding dunks, fast breaks and three pointers to the highlight reels.
Defending champion Roger Federer has cruised through to the second week of the Australian Open, defeating Frenchman Richard Gasquet in straight sets.
Players are lasting longer and veterans are dominating as the professional tennis tour shifts from being a game for young bucks to a game for wily veterans.
Has the Wild Thing turned into the Mild Thing?
Six-time champion Novak Djokovic has struck form to advance to the fourth round of the Australian Open, looking in excellent touch during a straight-sets routing of Spain's Albert Ramos-Vinolas.
First came the shock change of court, then came the unwanted exit, as Ashleigh Barty's Australian Open campaign was brought to a crashing halt by Japan's Naomi Osaka on Saturday.
Former Australian Open champion Angelique Kerber sent out a stark warning to the rest of the field that she is back in top form and ready to regain her crown after ruthlessly dismantling another former Australian titlewinner, Maria Sharapova, in a one-sided third-round game on Saturday night.
Hyeon Chung is from South Korea. He wears glasses while he plays tennis, and has a bottom half that would look more appropriate attached to a retiring Bulgarian weightlifter than a 21-year-old tennis player.
No. 1 seed Simona Halep has survived an epic, record-equalling third-round dogfight with little-known American Lauren Davis to advance and stave off the carnage inflicted on the top players in the women's draw.
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