Coco Gauff's ex-coach says Naomi Osaka changing coaches has helped her reach first WTA 1000 final in 3 years at Canadian Open

Coco Gauff's ex-coach Brad Gilbert recently assessed Naomi Osaka's incredible run to the women's singles final of the 2025 National Bank Open in Montreal, Canada. Osaka is set to face home favorite, 18-year-old Victoria Mboko, in the final on Thursday, August 7.

The Japanese, a former World No. 1 and a four-time Major champion, came into Montreal on the back of parting ways with coach Patrick Mouratoglou. In Canada, she began her trial-basis collaboration with Tomasz Wiktorowski, Iga Swiatek's ex-coach, and so far, their collective work behind the scenes has yielded incredible results for the Japanese at the WTA 1000 hardcourt event.

After a straightforward first-round win in Montreal, the Japanese survived a scare in the second round, as she found herself trailing No. 13 seed Liudmila Samsonova 4-6, 3-5 with the Russian having two match points. Remarkably, Naomi Osaka saved both and eventually went on to emerge victorious. Since then, the 27-year-old has been in red-hot form at the 2025 National Bank Open.

Jelena Ostapenko, Anastasija Sevastova, Elina Svitolina and Clara Tauson all suffered straight-set losses to the Japanese as she reached a WTA 1000 final for the first time since the 2022 Miami Open. On Wednesday, August 6, Coco Gauff's former coach Brad Gilbert took to X (formerly Twitter) and reflected on the former No. 1's rock-solid displays since her narrow second-round win over Samsonova. Gilbert wrote:

"Seems like quite some time ago Double Osaka saved a few match points 2nd rd, been house money 💰 since and totally discovered her game and rolling last few opponents."

Brad Gilbert

@bgtennisnation

seems like quite some time ago Double Osaka saved a few match points 2nd rd, been house money 💰 since and totally discovered her game and rolling last few opponents

A fan subsequently asked the veteran coach about what he thinks is the reason behind Osaka's success so far in Montreal. According to Gilbert, the Japanese's split with Mouratoglou and subsequent collaboration with Wiktorowski, is paying dividends. The 63-year-old also opined that the WTA icon has found her confidence again, writing:

"A new coach for one ☝️ and got her confidence back"

Brad Gilbert

@bgtennisnation

@JulieSmythOtt a new coach for one ☝️ and got her confidence back

Naomi Osaka "shook" after being told of Victoria Mboko's admiration for her ahead of Canadian Open final

Naomi Osaka during a press conference at the 2025 National Bank Open in Montreal (Source: Getty)

Four years ago, Victoria Mboko named Naomi Osaka as her idol in an interview. The Japanese was told about this at a press conference following her semifinal win at the 2025 National Bank Open, and asked what it feels like for her to face an opponent who idolizes her.

"I don't think that's ever happened. I'm shook. No, I mean, it's really cute. I guess I have to have a really good attitude tomorrow. I can't let her not like me anymore. I don't know, it's funny because I was, like, I see her on the TV, and I was low-key, like, That's my little twin, because we both have our blue dresses and our buns and everything," Osaka replied.

If Naomi Osaka manages to get the better of Mboko in the Montreal final, she will return to the WTA top 20 from her current position of No. 49. Meanwhile, the Canadian teenager will assure herself of a top 30 spot if she wins her maiden WTA Tour-level title in Montreal.