Hobart, Australia (SportsNetwork.com) - Top seeds Casey Dellacqua, Zarina Diyas and Camila Giorgi were among Monday's opening-round victors at the Hobart International tennis tournament, a final Australian Open tune-up.

The top-seeded Aussie Dellacqua snuck past American Lauren Davis 6-4, 1-6, 6-4, while Kazakhstan's Diyas doused Spanish lucky loser Silvia Soler-Espinosa 6-3, 6-4 and the Italian Giorgi grounded Aussie wild card Storm Sanders 5-7, 6-1, 7-6 (8-6) on the hardcourts at the Hobart International Tennis Centre.

In other action involving seeds, American qualifier Madison Brengle upset No. 7 German, 2012 champion and 2013 Hobart runner-up Mona Barthel 6-7 (6-8), 7-5, 7-6 (7-2), No. 8 American Alison Riske bested compatriot Christina McHale 6-4, retired, and No. 9 Italian Roberta Vinci edged out Aussie wild card Olivia Rogowska 6-1, 4-6, 6-3.

Several other women reached the second round, including German Annika Beck, Brit Heather Watson, Serb Bojana Jovanovski, and Slovakian wild card Daniela Hantuchova.

The 2015 Hobart titlist will earn $43,000.