At a time when tennis fashion is being taken to its logical extreme, Donna Vekic is staking a claim for its country club roots. “A lot of brands are getting into crazy patterns, crazy colors ...

NEW YORK—Donna Vekic is not the biggest fan of the Big Apple. That may be putting it lightly. “I hate New York,” she deadpans. I smile, thinking she’s made a joke. “It’s not a joke!” ...