British number one Johanna Konta is out of the Hobart International after a first-round defeat to third seed Dominika Cibulkova.
Konta, 24, was beaten 7-6 (8-6) 7-5 after failing to convert five first-set points in the tie-break.
"It doesn't happen every day that you win a tie-break from 1-6 down against such a good serving player," said Slovak Cibulkova, 26.
Defending champion Heather Watson faces Teliana Pereira in the first round.