On January 19, Beijing time, the fourth matchday of the Australian Open will be contested. In a match in the second round of the men's singles, nine-time champion Djokovic faced the challenge of world No. 190 Kukaud. In this match, Deyo played a fierce four-set match with an injury, knocked out his opponent 3-1, and won 23 consecutive Australian Open games to reach the round of 32.

In the first set, Deyo broke serve first in the fourth game to take a 3-1 lead. In the sixth game, Deyo broke the opponent's serve again, leading 5-1 to win the set with serve. In the 7th game, Deyo successfully saved serve and won the first set 6-1.
In the second set, Deyo requested a medical timeout after 4-5, after which the two sides fought to tie seven. Kukaude excelled in a tie-break, winning the second set 7-5.
In the third set, Deyo broke serve first in the second game to make it 3-0. In the fourth game, Deyo missed four break point chances, and the opponent tenaciously held serve to chase 1-3. In the 8th game, Deyo broke serve in a game that had to be saved, winning the third set 6-2.
In the fourth set, Deyo broke serve first in the second game, he saved the break point in the third game, and Deyo broke the opponent's serve again in the fourth game to take a 4-0 lead. In the sixth game, Deyo broke serve again and won the fourth set 6-0.
In a match that lasted 3 hours and 4 minutes, No. 4 seed Djokovic defeated world No. 190 qualifier Kukaude 6-1/6(5)-7/6-2/6-0 to win 23 consecutive Australian Open games and reach the third round of the Australian Open for the 15th time. In the next round, Djokovic will face 27th seed Dimitrov.