British number four Aljaz Bedene exited the Australian Open in the first round after being beaten in four sets by Dominican Victor Estrella Burgos.
The 27-year-old lost 7-6 (9-7) 7-5 0-6 6-3 in three hours and nine minutes in Melbourne on Monday.
Slovenian-born Bedene, ranked 108 in the world, was 5-2 up in the opener before Estrella Burgos fought back to take the first two sets.
Bedene eased to victory in third, but it was Estrella Burgos who progressed.