Osaka makes winning return to Grand Slam tennis at US Open

Naomi Osaka, of Japan, is introduced during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Elise Amendola)

Naomi Osaka, of Japan, returns a shot to Marie Bouzkova, of the Czech Republic, during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Elise Amendola)

Naomi Osaka, of Japan, returns a shot to Marie Bouzkova, of the Czech Republic, during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Elise Amendola)

Marie Bouzkova, of the Czech Republic, returns a shot to Naomi Osaka, of Japan, during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Elise Amendola)

Naomi Osaka, of Japan, speaks to the crowd after beating Marie Bouzkova, of the Czech Republic, during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Elise Amendola)

Naomi Osaka, of Japan, celebrates after beating Marie Bouzkova, of the Czech Republic, during the first round of the US Open tennis championships, Monday, Aug. 30, 2021, in New York. (AP Photo/Frank Franklin II)

NEW YORK — Naomi Osaka is back in Grand Slam action after a mental health break. Back to playing quite well, too.