00:00 CET - Welcome back to the Tennis Tracker in the early hours of Friday morning on men's semi-final day at the Australian Open!
Incredibly, we are left with the top four seeds still in the competition, meaning these match-ups are as good as it gets. Up first at 04:30 CET is a meeting between world number one Carlos Alcaraz and world number three Alexander Zverev.
The former has swept into the semi-finals without dropping a single set, as he continues his quest to become the youngest man in the Open Era to complete the Career Grand Slam. Meanwhile, the latter has also looked in great touch as he eyes his maiden major title.
Interestingly, the head-to-head between the pair is locked at 6-6, but a lot of Zverev's victories over Alcaraz came early in the Spaniard's career, with Alcaraz winning three of the last four meetings.
It could be a competitive match, but Zverev will have to serve lights out if he wants to win this last-four encounter.
That will be followed by the second semi between two-time defending champion Jannik Sinner and 10-time champion Novak Djokovic.
Sinner hasn't looked at his usual brilliant best in this tournament, as he has struggled with the heat, while Djokovic was extremely fortunate not to be dumped out after Lorenzo Musetti was forced to retire from their quarter-final after leading two sets to love.
Djokovic was also given a free pass into the quarter-finals after Jakub Mensik withdrew from their last-16 clash, meaning the Serbian great hasn't won a set since Saturday.
Taking into account Djokovic's age, how unconvincing he has looked, and the fact that Sinner is simply relentless in Australia and has won their last five meetings, it would be a major shock if the Italian didn't reach a third-straight final.