MELBOURNE, Australia—Top-ranked Barbora Krejcikova and Katerina Siniakova took another major step in a partnership which began in junior ranks when they won the Australian Open women’s doubles 6–7 (3), 6–4, 6–4 Sunday from unseeded Anna Danilina and Beatriz Haddad Maia. The Czech pair claimed their first Australian Open title to go with one Wimbledon and…