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Stefanos Tsitsipas has sensationally downed Roberto Bautista Agut in a fourth set triumph, advancing to his first Open semi-final.
"It feels like a fairytale," he said. "I'm living the dream."
Bautista Agut served up a double fault to hand Tsitsipas a match point opportunity late in the fourth set, but the Spaniard scraped his way through with a thundering forehand winner to send it to a tiebreak.
But from there, the Greek youngster ran away with it, blasting Bautista Agut 7-2 in the break before falling to the deck in awe of his achievement.
At 20 years and 168 days, Tsitsipas is the youngest player to reach an Australian Open semi final since Andy Roddick in 2003. He is also the first Greek player in history to reach a grand slam semi.
Tsitsipas was slow out of the blocks in his quarterfinal against Roberto Bautista Agut, dropping serve in the opening game of the match and being forced to really fight not to go behind a double break.
Tsitspas managed to hold his second service game and after breaking back to square the match at 4-4 continued to dominate proceedings to win the opening set 7-5.
The Greek 20-year-old is attempting to become the youngest player to make a grand slam semi since Novak Djokovic more than a decade ago.
Earlier, Aussie juniors talent Rinky Hijikata was sensationally been knocked out of the Australian Open after simply choosing not to play match point.
The No. 5 seed appeared to simply forget the rules for this year's boys singles where let serves that land in are played on as regular points.
In a costly brain snap, Hijikata whacked his opponent Zane Khan's first serve straight into the ground – clearly forgetting that the point was live, despite the ball clipping the net on its way through.
The incredible moment happened on match point when Khan was serving at 5-4 in the second set.
Hijikata's costly error not to return the serve ended the match abruptly and painfully for the Aussie.
Khan was awarded the win 6-4 6-4 and Hijikata simply had to accept his defeat, despite clearly looking bewildered when the match was awarded to the American.
The Aussie teenager may have lost his second round boys singles match, but he will be back in action in the boy's doubles on Tuesday afternoon.
Hijikata had recently payed in the qualifying draw to try and sneak into the main draw of the Australian Open where the controversial let rule does not exist.