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The Latest: Still-perfect Novak Djokovic advances at US Open

A ball person holds a US Open tennis ball during the third round of the U.S. Open tennis championships, Thursday, Sept. 3, 2020, in New York. (AP Photo/Frank Franklin II)
A ball person holds a US Open tennis ball during the third round of the U.S. Open tennis championships, Thursday, Sept. 3, 2020, in New York. (AP Photo/Frank Franklin II) (Copyright 2020 The Associated Press. All rights reserved.)

NEW YORK – The Latest on the U.S. Open tennis tournament (all times local):

9:00 p.m.

Top-seeded Novak Djokovic stayed perfect for 2020 and advanced to the fourth round of the U.S. Open with a straight-sets win.

He beat Germany's Jan-Lennard Struff 6-3, 6-3, 6-1 in an hour and 43 minutes, holding serve throughout. Struff managed only four break points and couldn't convert.

Djokovic has won his last 29 matches and is 26-0 this season, making him a prohibitive favorite to get his fourth U.S. Open title — he won it in 2011, 2015 and 2018. He'll play 20th-seeded Pablo Carreno Busta.

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8:10 p.m.

Alexander Zverev reached the fourth round at the U.S. Open for the second year in a row, beating Adrian Mannarino in a match that was delayed because of health concerns.