Naomi Osaka's hair stylist spills on what went into the tennis champ’s Sports Illustrated cover look.

To achieve the laid-back style, her stylist, Marty Harper, used all NatureLab Tokyo products to add style and definition to her hair, perhaps as an homage to Osaka's Asian heritage. 

"In order to create Naomi's beautiful and natural textured look, it was all in the prep. You have to realize that healthy, bouncy hair is always a direct reflection of the way you love it," Harper tells InStyle. 

First, the celeb stylist, who also works on Halsey and Olivia Palermo, used a dime-size amount of the Smooth Shampoo at the roots to create a nice lather to prep Osaka's locks. This enriched cleanser evokes a warm, fresh scent of a freshly peeled Japanese yuzu and does a masterful job of reducing frizz and increasing hair smoothness with consistent use. 

Then Harper layered the Smooth Conditioner and Repair Masque to create a highly hydrating treatment. Both of these potent products leave hair strong and silky-smooth, while also providing a healthy dose of humidity resistance. 

Once the hair was rinsed and nearly dried, Harper then created a cocktail of products to customize the styling method he had in mind. He mixed the Repair Leave-In Treatment and Smooth Hair Oil together for a nourishing touch before he went into to create the earthy, undone texture seen on the star.

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