Possible Clues:

• Place to make a case
• Margaret --, Australian tennis player who won a total of 64 Grand Slam titles
• Quadrangular tennis area
• Aussie 14 champ here? (the completed grid represents one)
• Woo; assizes
• Heard nicked criminal on trial here?
• *Server's spot?
• Short trousers old judge might be seen in here
• See 17 Down
• Hardwood playing surface