Stefanos Tsitsipas saw off Rafael Nadal in stunning fashion to set up an Australian Open semi-final against Daniil Medvedev.
The Greek star has already secured a major career triumph in Melbourne, after beating Roger Federer two years ago.
If that win was his initial arrival on the tennis scene, this triumph feels like his coming of age moment.
Tsitsipas looked down and out on Rod Laver Arena after losing the first two sets to Nadal, but he fought back in remarkable fashion to win 3-6, 2-6, 7-6, 6-4, 7-5.
The size of that comeback cannot be underestimated.
For a start, Nadal’s first two set triumphs were his 34th and 35th in a row at Grand Slam level.
It was the 225th time he had led by two sets to love. It became only the third time he has squandered such a lead.
The Spaniard’s level clearly dropped, but part of that was down to Tsitsipas raising his game on the biggest of stages.
This feels like the big opportunity for both Tsitsipas and Medvedev
Male tennis’ ‘next-gen’ have threatened to overtake the sport’s three greatest players of all-time in recent years.
Now they are knocking loudly on the door.
Either Medvedev or Tsitsipas will take part in Sunday’s Australian Open final – almost certainly against Novak Djokovic.
Dominic Thiem sealed his first Grand Slam title in New York last year, while Alexander Zverev is not a million miles away from doing similar.
But that Thiem success did have a very loud asterisk next to it.
Neither Nadal nor Roger Federer played at Flushing Meadows, while Djokovic was defaulted for striking a line judge with a ball. (BBC)
The Serb is still the man to beat in Australia, and he will take some beating.
But it’s hard not to shake the feeling that this is the big moment for the next-gen, and either Medvedev or Tsitsipas.