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How Leonard Francois and Tamaki Osaka shaped Naomi Osaka’s path to the top

Leonard Francois and Tamaki Osaka guided Naomi from her childhood to Grand Slam success. Family bond

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Naomi Osaka’s return to form in 2025 has brought renewed attention to the family behind one of the sport’s most accomplished players. A two-time champion at both the US Open and Australian Open and a former WTA world No 1, Osaka’s rise was rooted in a childhood shaped by her parents, Leonard Francois and Tamaki Osaka.

Leonard Francois was born and raised in Haiti and later attended New York University. He met Tamaki in Sapporo while visiting during his collegiate days, initially keeping their relationship private. The couple’s first daughter, Mari, arrived in 1996 and Naomi followed in October 1997. Naomi was born in Osaka and, as is customary in Japan when only one parent is a native Japanese citizen, she takes her mother’s surname.

The family lived in Japan during Naomi’s earliest years before moving to New York when she was four to be closer to Leonard’s parents. Inspired by the Williams family’s example, Leonard introduced Naomi and Mari to tennis after the move to the United States. “The blueprint was already there. I just had to follow it,” he once told the New York Times. The family relocated to Florida when Naomi was eight, and Leonard remained her primary coach until she joined the ISP Academy at 15.

Despite spending most of their childhood in America, Leonard and Tamaki decided early that both daughters would represent Japan in their professional careers. “We made the decision that Naomi would represent Japan at an early age,” said the couple, speaking to the Wall Street Journal in 2018.

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“She was born in Osaka and was brought up in a household of Japanese and Haitian culture. Quite simply, Naomi and her sister Mari have always felt Japanese, so that was our only rationale.

“It was never a financially motivated decision, nor were we ever swayed either way by any national federation.”

Osaka has frequently acknowledged her parents’ sacrifices. She said: “I came from a mum that worked for basically my entire childhood to put me through tennis. My dad, who was with me the entire time. And I knew that they had a really hard time.

“Tennis is an expensive sport. So, just to put two kids through that and just, I guess, believe in them so much is something that — I always call my parents a bit crazy.”

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Leonard has at times stepped back into a coaching role, most notably at the end of 2019, and both parents have been present at major matches, including Naomi’s maiden Grand Slam win at the 2018 US Open. They have also appeared in documentaries that follow her career.

Analytics & Stats

US Open app deepens fan access to serve data and live match analysis

Live serve data, match tracking and AI tools are changing how fans follow the US Open this year.

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Tennis followers are getting a closer look at the US Open this year, with instant data giving the viewing experience a far more detailed edge.

Elite players have long depended on extensive statistics to shape their match plans, with opponent analysis now a central part of preparation. What was once reserved for teams and coaches is increasingly being pushed toward the wider audience, and IBM has taken that expansion further at the US Open.

Through the official US Open app, fans watching at Flushing Meadows or around the world on TV can now use live data to read matches in greater depth. One of the main additions is a new Serve Quality metric, designed to give viewers a more technical understanding of serving performance.

The tool is available across all 254 singles matches at this year’s US Open. It uses advanced limb-tracking technology developed with IBM Bob to analyse the mechanics of every serve, recording 21 data points across the body and racquet 50 times per second. From wrist flex to the transfer of energy from a player’s legs through the torso, the system captures a huge volume of detail, producing roughly 1.2 billion data points across the tournament.

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Fans can follow serving efficiency, accuracy, consistency and ball toss through a live stream of information that explains what separates one serve from another. The app also includes a ‘likelihood to win’ tracker, which reflects the changing stages of a match, while ‘Match Chat’ offers another way for users to engage with the action.

Former ATP Tour player turned TV commentator Sam Querrey described how heavily the sport now leans on information. “The data has gotten so much more aggressive for all athletes in the last couple years.” He added: “As a player, I can’t think about 15 to 20 different things if I’m returning or serving. That’s where the coach comes in. If there’s data that they can look at that’s obvious, they can then give that to the player, and the player can kind of go with those three or four bullet points.”

These developments are not limited to tennis, but the sport is clearly part of a wider shift in how fans experience matches. With AI technology continuing to develop, this kind of live analysis appears set to become an even bigger part of viewing in the years ahead.

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Kyle Edmund weighs in on the injury toll in tennis

Kyle Edmund discusses why tennis injuries keep rising, pointing to physical demands and balls.

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Former British No 1 Kyle Edmund has spoken about the possible reasons behind tennis’s mounting injury problems in an interview with Tennis365.

The issue has been impossible to ignore across both tours in 2026, with players repeatedly forced out of major events. Before Wimbledon’s main draw even began, 18 players had withdrawn across the men’s and women’s entry lists. Among those who have already spent extended periods sidelined in recent months are Carlos Alcaraz, Jack Draper, Emma Raducanu, Victoria Mboko and Lorenzo Musetti.

Edmund knows the physical strain of the sport as well as anyone. He retired in August 2025 at the age of 30 after a career interrupted by serious injury setbacks, and he said the modern game places a greater load on players than it did in the past.

“I think there’s no doubt the game is more physical, certainly being on the tour and speaking to ex-players… the demands, the way people are moving is physical,” said Edmund, who achieved a career-high ranking of world No 14

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He also pointed to the packed schedule and the structure of the season as major contributors to the strain on bodies.

“There’s chat about the calendar, more days at the tournaments, the extended Masters events. [There’s] probably less downtime between the tournaments, so you don’t have time to do physical blocks to build your body up throughout the year. You’re very much maintaining.

“So apart from the off-season, you’re just maintaining throughout the year, and to maintain and do training where you’re just, not trying to increase your fitness, but just cope with the demands for 11 months of the year, can be a challenge.”

Edmund, who reached the semi-finals at the 2018 Australian Open, added that the balls used on tour may also be linked to more arm and wrist problems.

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“There’s another thing: the balls. I don’t have stats with the balls, but the arm injuries, the wrist injuries… I had a wrist injury at the back end of my career. I never had any wrist injuries before… I don’t what that was,” said the two-time ATP Tour title winner.

“I was obviously coming back from a knee injury, so it might’ve just been I wasn’t ready for the demands of playing match after match.”

His view is echoed by several leading names. Novak Djokovic, Daniil Medvedev, Alcaraz and Raducanu have all complained about the balls used on the tours in recent years, with Djokovic saying: “That’s probably the biggest difference I can notice, compared to maybe 10, 15 years ago. It’s the balls.”

In February 2025, Alcaraz said: “I think last year there were many injuries, many players with elbow or shoulder issues. It needs to change. I know they will change it.

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“Every week, practically every week, we have different balls, different conditions, so it’s complicated to adapt to them.”

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Analytics & Stats ATP French Open

Auger-Aliassime Records 100th Week Inside ATP Top 10

Auger-Aliassime reaches his 100th week in the ATP Top 10; he is currently ranked No. 5. Milos Raonic

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Felix Auger-Aliassime is celebrating his 100th career week inside the ATP Top 10 as the clay-court major approaches. The Canadian has reached the milestone in four separate stints: November 15th to 21st, 2001 (one week), January 10th to September 11th, 2022 (35 weeks), October 17th, 2022 to June 11th, 2023 (34 weeks) and October 27th, 2025 to present (30 weeks and counting).

Auger-Aliassime is currently at his career-high ranking of No. 5 and joins a small group of players born in the 2000s to accumulate triple-digit weeks in the elite. The draft notes he reached the mark “after exactly who you’re thinking.”

The milestone places him among the longest-serving Canadians to reach the Top 10. He becomes the second Canadian to log that many weeks at the top of the rankings, following Milos Raonic, who spent 151 weeks in the Top 10 across the 2013, 2014, 2015, 2016 and 2017 seasons. Denis Shapovalov is the only other Canadian to have reached the ATP Top 10, spending 10 weeks there across 2020 and 2021.

The pattern of Auger-Aliassime’s tenure in the Top 10—multiple returns to the group rather than a single continuous stretch—highlights his resilience and consistency at the highest level. As Roland Garros nears, the 100-week marker is a reminder of his standing on the ATP Tour and of the depth of Canadian men’s tennis in this period.

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