Coconut water helps to beat cramps
Marathon man John Isner has revealed the secret of his stamina - coconut water.
The American, who crashed out of Wimbledon the day after his record-breaking 11-hour match finished, said he had started drinking it to beat cramps.
The 25-year-old said: "I've been drinking that for a while now, it's called Vita Coco. It helps rehydrate me really well."
He added: "In previous years I had issues with cramping but ever since I've started drinking that... I've nipped that problem in the bud."
A host of Hollywood celebrities have been pictured drinking Vita Coco in recent months.
Isner's relationship with Vita Coco dates back two years, when the brand started sending him regular shipments.