Naomi Osaka said Monday she felt a "sense of duty" to Japan when she was offered the chance to light the Olympic cauldron at last week's Tokyo Games opening ceremony, now she has zeroed in on finishing the job on the tennis court.

Making her Olympic debut in Tokyo, Osaka's image was instantly etched into Japanese sporting history when she appeared on screen as the last person to carry the Olympic flame at the spectator-free National Stadium.

Asked about the experience following her second-round victory in the women's singles, Osaka said she understands the gravity of the "really big honor," given that she grew up watching Olympic opening ceremonies.

"For me, it was something that you see as a kid on TV and you gather around the TV with your family and you watch the whole ceremony," she said. "I know my grandparents were probably crying."

"Honestly, I didn't feel pressured," she recalled. "For me, I felt more excitement and it was like a sense of duty, like something I wanted to accomplish."

Osaka is playing in her first tournament since she withdrew from the French Open in late May after revealing her battles with anxiety.

She cruised past China's Zheng Saisai in straight sets on Sunday and advanced to the third round after she defeated Switzerland's Viktorija Golubic at the quiet and nearly empty Ariake Tennis Park on Monday.

Osaka said she will now put all her focus on her next match against Czech Marketa Vondrousova.

"I know that these are the best players in the world and I honestly haven't played in a while, so I'm trying to take one match at a time," she said.

"It's a dream to be here to play in the Olympics. This is my first time. So yeah, just trying to cherish this experience."