(CNN)Emma Raducanu suffered a surprise defeat in the second round of the Australian Open, being beaten 6-4 4-6 6-3 by world No. 98 Danka Kovinic.
The 19-year-old Brit appeared to struggle with a blister on her hand throughout the match and required treatment on several occasions from the court doctor.
With the blister affecting her dominant right hand, Raducanu struggled to hit her forehand with her usual power and consistency and the unseeded Kovinic took full advantage to clinch the opening set.
It was an impressive start for the Montenegrin, who had never made it past the second round of a grand slam in 17 singles and doubles main draw appearances.
However, Raducanu was able to receive further treatment to her right hand during the interval and came out in the second set looking more like the player that stunned the tennis world by winning the US Open in September.
She regained control with her powerful baseline ground strokes and leveled the match after another hard-fought set.