Grand Slam events Tier I tournaments Tier II tournaments Sydney (S , D )Chicago (S , D )Paris (S , D )Indian Wells (S , D )Delray Beach (S , D )Houston (S , D )Amelia Island (S , D )Barcelona (S , D )Hamburg (S , D )Eastbourne (S , D )Stratton Mountain (S , D )San Diego (S , D )Manhattan Beach (S , D )Tokyo (S , D )Leipzig (S , D )Filderstadt (S , D )Brighton (S , D )Essen (S , D )Oakland (S , D )Tier III tournaments Brisbane (S , D )Osaka (S , D )Linz (S , D )Oklahoma City (S , D )Tokyo Outdoor (S , D )Lucerne (S , D )Strasbourg (S , D )Birmingham (S , D )Schenectady (S , D )Moscow (S , D )Quebec City (S , D )Tier IV tournaments Hobart (S , D )Auckland (S , D )Beijing (S , D )Pattaya (S , D )Kallang (S , D )Jakarta (S , D )Taranto (S , D )Prague (S , D )Palermo (S , D )Styria (S , D )Surabaya (S , D )Taiwan (S , D )Team events