Canada’s Dabrowski, Brazil’s Stefani advance to semifinals at WTA Finals after perfect group stage

Ottawa’s Gabriela Dabrowski and Brazil’s Luisa Stefani advanced to the doubles semifinals at the WTA Finals after defeating Latvia’s Jelena Ostapenko and Taiwan’s Su-Wei Hsieh 2-6, 7-6 (2), 10-3 on Friday in Indian Wells, Calif.