We know how much the Japanese market can be lucrative. The 28-year-old Kei Nishikori earned more than $30 million in the last year from endorsmements and Naomi Osaka could seek a similar direction. In an interview to The Daily Mail, Osaka's agent Stuart Duguid spoke about this topic.

‘She’s from Japan with a multicultural background from Haiti and the United States, so she has the full package. She is very honest and down to earth and people are relating to that. She’s going to have a very successful career on and off the court', said Duguid.

Osaka is set to renew her deal with Adidas at the end of this year, and it could be worth $10 million annually. Just think that from 2008 to 2018, the 20-time Grand Slam winner Roger Federer earned $10 million a year as well, from Nike.

‘We manage Kei so we know how strong that market is for endorsements, the blueprint was there,’ added Duguid. ‘There’s a lot of companies for whom Kei is the male and they are looking for a female, so it couldn’t be better timing.

Her clothing deal is up at the end of the year so we are in discussions with pretty much everyone on that.’ Nissin, Yonex and Citizen are already some of the biggest Osaka's endorsmements, but definitely other ones will join the list, a little bit like what happened for Sloane Stephens last year.

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