Like any pro sport, tennis has its mighty fair share of fashion mavens. You can see them fly by on social and in the headlines, be it Serena Williams' latest partnership (a stunning set with Stuart Weitzman), Roger Federer's seemingly effortless cool alongside Anna Wintour, or Dominika Cibulkova's label-loaded Instagram.

Still, the sport also has a lesser known set of wardrobe enthusiasts. Call it the glittered underbelly of style, inside and outside the lines of the court. Here, in no particular order, are the five most underrated fashionistas in pro tennis.

1

Donna Vekic

Still just 23, with a rocket-launching serve and a high-profile ATP romance behind her, the Croatian has stepped into her own in recent years. That includes the style game, in which she gives off an effervescent vibe, doesn't try too hard, but always looks glamorous—be it for a special event, a night on the town of the week, or athleisure looks around her home.

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2

Jo-Wilfried Tsonga

He can be understated about it, and he's not given to flashes of color like some of his peers on the ATP and WTA tours both, but the Frenchman, 35 years on, doffs panache in favor of mainlined polish.

3

Anastasia Pavlyuchenkova

The Russian, apt to be dubbed a veteran at age 28, has long relished fashion but doesn't overtly flaunt it as perhaps she could. She's as likely to sport a plaid power-suit with boots—upscale '90s grunge—as she is to don a gown for a red carpet. Her yin-plus-yang approach to playing with and layering looks unwittingly leads her right onto this list.

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4

Lucas Pouille

Yes, another Frenchman—but the short of it is that anyone who can carry off this well-tailored, business-casual look on their wedding day deserves a mention.

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5

Sorana Cirstea

The 30-year-old Romanian always looks fresh, with a smile to match. Sure, she shows out just after a follicle update here, but her below-the-neck style itself comes curated and personal.

When it comes to low-key fashion lovers, we've got five on it for these fine players, who double as low-key clotheshorses. Each boasts a tried-and-true approach to on-court style, and away from the game, they do the sometimes-understated same.