Julia Goerges of Germany posted a first- round upset win over Wimbledon runner-up Agnieszka Radwanska at the Olympics on Sunday.
Goerges outlasted Radwanska, the No. 2 seed, by a 7-5, 6-7 (5-7), 6-4 margin at the All England Club.
Rain forced the match to be played under the retractable roof on Centre Court. It was the first time Olympic tennis has been played indoors in the modern era.
Play on the uncovered courts started after a delay of about three hours.