Hsieh Su-wei of Taiwan has become the second-oldest woman to win a Grand Slam doubles title after teaming with Elise Mertens of Belgium Sunday to win the Australian Open women’s doubles. The second-seeded pairing of Hsieh and Mertens beat 11th seeded Jelena Ostapenko of Latvia and Lyudmyla Kichenok of Ukraine 6-1, 7-5 in Sunday’s final. It was Hsieh’s seventh Grand Slam women’s doubles title and Mertens’ fourth, their second together.