Caroline Wozniacki has been defeated by Anett Kontaveit at the second-round stage of the Nottingham Open.
After a 10-week absence, Wozniacki made her return to the WTA Tour on Tuesday with an impressive showing against Cagla Buyukakcay, but she was edged out during the closing stages against Kontaveit.
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The former world number one took the opening set on a tie-break but she was quickly pegged back by the 20-year-old Estonian.
The deciding set was back and forth but Kontaveit broke for a third time to secure a 6-7 6-3 7-5 triumph over the Dane.
Wozniacki faces being unseeded for Wimbledon should she fail to reach the latter stages of any tournament ahead of SW19.