Samantha Stosur’s lamentable record at Melbourne Park has continued with a first-round loss to rising Ukrainian star Dayana Yastremska, her fourth-straight defeat in the Australian Open’s opening round.

Stosur, the only Australian woman to win a major since Evonne Goolagong Cawley in 1980, has lost to the 18-year-old 7-5 6-2 in one hour and 18 minutes.

The 34-year-old Queenslander’s latest defeat is typically disappointing, collapsing from an early break and a 4-1 lead to lose 12 of the next 15 games.