British number one Johanna Konta was knocked out in the Pan Pacific Open last-16 in a straight-set defeat by Croatia’s Donna Vekic.
World number 43 Konta lost 6-3 7-5 in one hour 22 minutes in Tokyo.
Having lost the opening set, Konta, 27, was 4-1 up and had a chance to serve for the second before the 22-year-old fought back.
Vekic, who beat Sloane Stephens in the opening round, faces French second seed Caroline Garcia in the quarter-finals.
