Grand Slam events Tier I tournaments Tier II tournaments Tokyo Indoor (S , D ) Chicago (S , D ) Palm Springs (S , D ) Amelia Island (S , D ) Houston (S , D ) Hamburg (S , D ) Eastbourne (S , D ) Manhattan Beach (S , D ) Washington (S , D ) Tokyo (S , D ) Milan (S , D ) Zurich (S , D ) Filderstadt (S , D ) Brighton (S , D ) Oakland (S , D ) Philadelphia (S , D ) Tier III tournaments Tier IV tournaments Brisbane (S , D ) Oklahoma City (S , D ) Tokyo (S , D ) Geneva (S , D ) Strasbourg (S , D ) Birmingham (S , D ) Kitzbuhel (S , D ) Albuquerque (S , D ) Paris (S , D ) Bayonne (S , D ) San Juan (S , D ) Phoenix (S , D ) Nashville (S , D ) Indianapolis (S , D ) Tier V tournaments Auckland (S , D ) Wellington (S , D ) Oslo (S , D ) Linz (S , D ) Aurora (S , D ) Pattaya City (S , D ) Bol (S , D ) Taranto (S , D ) Palermo (S , D ) San Marino (S , D ) Westchester Cup (S , D ) Schenectady (S , D ) St. Petersburg (S , D ) Sao Paulo (S , D ) Team events