Madison Keys of the United States was forced to concede her Wimbledon third round match against Yaroslava Shvedova today after failing to recover from a left thigh injury.
The 19-year-old suffered the injury in the latter stages of Saturday's tie which was suspended due to darkness.
She was trailing 7-6 (9/7), 6-6 when play was halted having received on-court treatment for the injury.
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Shvedova, the world number 65 from Kazakhstan, goes on to face either Germany's Sabine Lisicki, the runner-up in 2013, or Serbia's Ana Ivanovic for a place in the quarter-finals.
Lisicki was leading their third round tie 6-4, 1-1 when their encounter was also halted late Saturday.