The 23-time Grand Slam singles champion and consensus tennis GOAT fell in three gripping sets to Ajla Tomljanovic, 7-5, 6-7 (4), 6-1.

At this point, it's fair to wonder how far the 40-year-old, soon-to-be-retiring champion can advance.

As the world followed, David Kane shared the scene from Arthur Ashe Stadium.

World No. 2 Daniil Medvedev denied Novak Djokovic a calendar-year Grand Slam in stunning fashion Sunday with a 6-4, 6-4, 6-4 win at Flushing Meadows.

Eighteen-year-old Emma Raducanu defeated 19-year-old Leylah Fernandez, 6-4, 6-3, in Saturday's final at Flushing Meadows to become the first qualifier in history to clinch a major title.

The world No. 1 snapped Alexander Zverev’s 16-match win streak with a 4-6, 6-2, 6-4, 4-6, 6-2 victory Friday night. Earlier, Daniil Medvedev reached his second US Open final in three years by dismissing Felix Auger-Aliassime, 6-4, 7-5, 6-2.

Leylah Fernandez continued her dream run with a 7-6 (3), 4-6, 6-4 victory over world No. 2 Aryna Sabalenka Thursday, before qualifier Emma Raducanu outclassed No. 17 seed Maria Sakkari, 6-1, 6-4.

Novak Djokovic moved to within two victories of a monumental calendar-year Grand Slam after overcoming Matteo Berrettini, 5-7, 6-2, 6-2, 6-3, on Arthur Ashe Stadium after midnight Thursday.

The Canadian led 6-3, 3-1, when the 18-year-old stopped their quarterfinal clash Tuesday night. Alcaraz had called the trainer during the first changeover of the second set. Auger-Aliassime advances to face Daniil Medvedev.

On Labor Day, the quarterfinal lineup will be set at Flushing Meadows. Novak Djokovic solved the puzzle Jenson Brooksby presented to move within three wins of history, while Maria Sakkari handed Bianca Andreescu her first US Open defeat.

On Sunday, Daniil Medvedev sailed through, while 18-year-olds Leylah Fernandez and Carlos Alcaraz impressed again in reaching the quarterfinals. Later, Felix Auger-Aliassime topped Frances Tiafoe in four sets and Barbora Krejcikova closed out Garbiñe Muguruza after a lengthy medical timeout.

Novak Djokovic took another towards completing a calendar-year Grand Slam with his 17th straight win over Kei Nishikori, but fellow world No. 1 Ash Barty failed to serve out her match twice in falling to Shelby Rogers Saturday.

Elsewhere Friday, world No. 2 Daniil Medvedev rolled into the fourth round, joining Garbiñe Muguruza and Angelique Kerber in the win column. In matches finishing well into Saturday, Aryna Sabalenka and Frances Tiafoe prevailed.

Despite Hurricane Ida's remnants pounding the Northeast last night, second-round action continued at the New York major on Thursday.

The 2017 champion outclassed the 17-year-old, 6-4, 6-2, on Arthur Ashe Stadium to move into the third round.

A pair of world No. 1s headlined the action on the second day of the New York major.

With a return to full capacity at Flushing Meadows after a fan-less tournament a year ago, opening day certainly delivered.