Naomi Osaka's Tokyo Olympic Games are off to a winning start, after Japan's tennis superstar beat China's Zheng Saisai 6-1, 6-4 in the first round Sunday.
Why it matters: It's the women's world No. 2's first match back after withdrawing from the French Open and Wimbledon Grand Slam tournaments for a mental health break — triggering global conversations about mental health in sports.
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It's also Osaka's first Olympics.
What she's saying: "The Olympics has been a dream of mine since I was a kid so I feel like the break that I took was very needed," Osaka told reporters after her win.
"I feel definitely a little bit refreshed and I’m happy again."
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