The brief 2017 vacation season is already being replaced with preseason training. Moving away from posting beachside photos, plenty of pros have instead been posting workout proof:

1

Karolina Pliskova

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2

Elina Svitolina

3

Kristina Mladenovic

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4

CiCi Bellis

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5

CoCo Vandeweghe

6

Novak Djokovic

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7

Eugenie Bouchard

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8

Thomas Berdych