Dellacqua was scheduled to play at the Hopman Cup but had to withdraw due to an injury. Ashleigh Barty took her place. She was awarded a wildcard into the Apia International Sydney but had a first-round loss to Kimiko Date-Krumm. Dellacqua was given a tricky draw at the Australian Open where she had to play young American Madison Keys who was bringing form and confidence into the match. Dellacqua fought hard but went down in two sets. The doubles, however, was a different story. Dellacqua partnered fellow Australian Ashleigh Barty who was only 16 years old. They opened the tournament by cruising past Francesca Schiavone and Polona Hercog. They stunned the 3rd-seeded team of Maria Kirilenko and Lisa Raymond and then 14th-seeded team of Natalie Grandin and Vladimíra Uhlířová to reach the quarterfinals. The duo then reached the semifinal by defeating Anastasia Pavlyuchenkova and Lucie Šafářová. Their semifinal was played on Rod Laver Arena and Dellacqua and Barty reached the final by defeating Zheng Saisai and Varvara Lepchenko becoming the first Australian duo to reach the women's doubles final of the Australian open since 1977. Despite their best efforts they were defeated by top-seeds Errani and Vinci in the final. They dropped the opening set in just 29 minutes, but gained composure in the second. In the final set, the Italians won the match and took home the title after being defeated the previous year.