Laura Robson's Australian Open campaign came to an end in a straight sets third-round defeat by Sloane Stephens.
The British number two was repeatedly treated for a shoulder problem as she lost 7-5 6-3 in one hour 49 minutes to the 19-year-old American.
Stephens, seeded 29th made a strong start, as Robson struggled with injury.
A string of unforced errors hindered the Briton's progress in the second set and denied her a second successive fourth-round Grand Slam appearance.