Aslan Karatsev continued his sensational run at the Australian Open when he stunned Grigor Dimitrov 2-6, 6-4, 6-1, 6-2 to become the fifth qualifier to reach the last four.
The world number 114 regrouped after an error-filled opening set to add the 18th seed to his list of upset victims at Melbourne Park and set up a clash with Novak Djokovic or Alexander Zverev for a place in the final.
Dimitrov looked shell-shocked as the Russian tightened up his game and pounded howitzer shots over the net -- faltering on serve and wandering around the Rod Laver Arena court listlessly in the 30 degree Celsius heat.
The 29-year-old Bulgarian took a medical timeout for treatment on his back after losing the third set but Karatsev would not be denied as he became the lowest-ranked player to reach a Grand Slam semi-final for two decades.
Medvedev fined $42,500 for US Open antics
Lionel Messi's late flurry sends Inter Miami to Leagues Cup final
Sabalenka sees off Kudermetova to reach third round in New York
Alcaraz cruises into third round with commanding win over Bellucci
India's Ashwin ends IPL career, may play in other leagues
