Spaniard up first for Watson
British number one Heather Watson has been handed a decent opening-round draw for the Olympics.
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Watson, who only found out she would be playing in the singles draw earlier this week, will meet Spain's Silvia Soler Espinosa in round one at Wimbledon, a player ranked 63rd in the world - just four places higher than the Briton.
Elena Baltacha will also be pleased with her draw - she plays Hungary's Agnes Szavay, who is playing the tournament on a protected ranking following injury.
However, Britain's third participant, Anne Keothavong, faces a tough task against former world number one Caroline Wozniacki.
Top seed Victoria Azarenka starts against world number 79 Irina-Camelia Begu, of Romania, but things look tougher for Wimbledon champion Serena Williams. She starts against Jelena Jankovic, the current world number 20.
Likewise, her sister Venus has a tough opener. She takes on French Open finalist Sara Errani.
Second seed Agnieszka Radwanska plays Julia Goerges, while Maria Sharapova, seeded third, opens against Shahar Peer.
If the seedings are followed, Azarenka will play Angelique Kerber in the last eight, while Serena will meet Wozniacki.
In the other half of the draw, Sharapova would face Sam Stosur - although the Australian could first have to see off Kim Clijsters. The Belgian, who retires after next month's US Open, opens against Roberta Vinci.
Radwanska v Petra Kvitova, last year's Wimbledon champion, is the other projected quarter-final.
In the doubles, both British pairs will play German opposition in the first round.
Baltacha and Keothavong will play Goerges and Anna-Lena Groenefeld, while youngsters Watson and Laura Robson meet Angelique Kerber and Sabine Lisicki.