On January 24, Beijing time, the fourth round of the Australian Open women's singles competition continued, and the No. 7 seed Sviatek met the world's 38th-ranked Costia. The two sides fought fiercely in three sets in this game, and Sviatek reversed after losing the first set, eliminating his opponent 2-1 and successfully reaching the quarterfinals of the Australian Open women's singles.
Sviatek was broken by his opponent as soon as he started in the first set, and Costia took a 2-0 lead after saving the set. In the 8th inning, Sviatek broke through the opponent's serve to make it 4-4. Sviatek missed a set in the 10th set and Costia completed a key break in the 11th set, followed by a 7-5 win in the first set in the love game in the 12th set.
In the second set, Sviatek came up to break the belt and took a 2-0 lead. In the 3rd set, Costia quickly broke back and then she saved to make it 2-2. In the 6th set, Sviatek broke the opponent's serve again, after which both sides saved their own serves, and Sviatek pulled back a set 6-3.
In the decider, Sviatek took the lead in the 5th set and Costia quickly broke back in the 6th set. In the 7th set, Sviatek broke again, and in the 8th set she managed to save the game, leading 5-3 to bring the game into an inning where there was no way back. In the 9th inning, Sviatek scored four consecutive runs to complete the break again, winning the decider 6-3.
In the end, in a three-set battle that took 2 hours and 27 minutes, the No. 7 seed Sviatek defeated Costia 5-7, 6-3, 6-3 to successfully reach the quarterfinals of the Australian Open women's singles. This was the first time in Sviatek's career that she had reached the quarter-finals of the Australian Open, and it was also her third grand slam quarterfinals in her career. Her opponent in the next round will be the winner between Sabarenka and Canepi.