In a sport where it's almost always sunny, tennis players have all kinds of strategies for keeping cool during changeovers: draping themselves in ice packs, drinking colorful concoctions, hiding under umbrellas, etc.
But one of the hardest-to-hide methods is a trademark of steadily-rising Czech player Marie Bouzkova. She has battled through long sets in the Kentucky heat this week with a trusted partner, her enormous thermos that she's had for over a decade.