Naomi Osaka is seemingly unstoppable right now, with an 11-match winning streak spanning title runs in both Osaka and Beijing, plus an opening-bout victory at the WTA Finals.

A tennis player acquires quite an assortment of items in all her travels, so Osaka showed the WTA what's in her bag ahead of the WTA Finals, in Shenzhen.

Here's what she had:

1

Headphones

"Everyone knows that I always walk around with headphones no matter what," Osaka says.

The Naomi Osaka Signature Limited Edition headphones, from Muzik, come out "Holiday 2019," for $349.

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2

Hairbrush

To tame her hair, which she lovingly describes as "crazy."

WATCH: Osaka shares what's in her bag for the WTA Finals

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3

Clothes

On Twitter last week, Osaka called the custom Sacai kit that she wore at the US Open and other recent tournaments "hands down best tennis outfit I’ve ever worn. No debate."

4

Sharpies

For signing autographs. Osaka has garnered a serious fanbase over the past year and a half, and some followers are so passionate that an autograph can bring them to tears.

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In a rematch of the Australian Open final, on Sunday, Osaka took on Petra Kvitova for her first round-robin match in Shenzhen, which she won, 7-6 (1), 4-6, 6-4. On Tuesday, she faces world No. 1 Ashleigh Barty.