2021 Australian Open: What to Watch on Tuesday Night. Australian Open (Tennis), Tennis, Djokovic, Novak, Swiatek, Iga (2001- ), Williams, Serena, Williams, Venus, Giorgi, Camila, Errani, Sara, Tiafoe, Frances (1998- ), Opelka, Reilly (1997- ), Fritz, Taylor Harry (1997- ), Hsieh Su-Wei (1986- )