EFENew York City, US

Japanese tennis player and No. 3 seed Naomi Osaka began a defense of her US Open title with a comfortable 6-4, 6-1 win against 87th-ranked Czech Marie Bouzkova on Monday.

Osaka, who did not play at Wimbledon and withdrew from the French Open after the first round due to mental health reasons began playing her best tennis only after the first eight games of the match when the score was 4-4.