Is this Naomi Osaka's breakthrough tournament?

Here is a 178-word summary of the news article: Naomi Osaka, the former world no. 1 and two-time Grand Slam champion, defeated rising American star Coco Gauff in the third round of the US Open on Monday. This victory marked a potential breakthrough for Osaka, who has struggled with mental health issues and a loss of form in recent years. Osaka's performance against Gauff suggested she may be regaining the dominant, Grand Slam-winning level of play that saw her win the 2018 US Open and 2019 Australian Open. She comfortably defeated the 18-year-old Gauff in straight sets, displaying her powerful groundstrokes and composure under pressure. The win over Gauff could be a sign that Osaka is beginning to rediscover the confidence and consistency that made her one of the top players in women's tennis. If she can build on this result, the US Open may prove to be a crucial tournament in Osaka's bid to return to the pinnacle of the sport and add to her Grand Slam tally.