This is the fourth installment of the series. If you want to understand one of the places Sloane Stephens got her desire to help others, look no further than her grandparents, Doc and Glo.

In the case of tennis champion Sloane Stephens, the 29-year-old’s decorated career is an ever-evolving display of the resilience necessary to overcome life’s toughest setbacks. In 2017 ...