By Rita Kokshanian
Updated Jul 20, 2015 @ 11:00 am
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serenawilliams/Instagram

Serena Williams is celebrating her Wimbledon win swimmingly. The tennis star, who took home the championship at the tournament just over a week ago, posted a snap of herself enjoying some down time on the beach in a monokini, and she looks good. In the photo, which she posted without a caption, Williams is seen looking off into the distance while showing off her insanely toned bod—how's that for some Monday gym motivation? But she wasn't the only one having fun and documenting it on Instagram. Keep reading to see the best celebrity 'grams from weekend:

Reese Witherspoon:

Naya Rivera:

Rachel Zoe:

Chrissy Teigen:

Cara Delevingne:

Behati Prinsloo:

Cindy Crawford:

Alessandra Ambrosio: