STANDARDS SECTION XVIII - TOURNAMENT STANDARDS OF PERFORMANCE measurements shall be made to the outside of the lines and all  lines of the court shall be white. For all combined Tournaments with the ATP other than WTA 1000  Mandatory Tournaments, minimum numbers of match and practice  courts must be approved by the WTA at least six (6) months prior to  the Tournament. b.  Minimum Numbers of Match and Practice Courts i.  Combined Tournaments with the ATP ii.  Indoor Tournament iii.  Outdoor Tournament Tournament Category Show  Courts Additional Match  Courts Practice Courts (on-site and  off-site) On-Site Practice  Courts WTA 1000 Non-Mandatory 1 1 4 1 WTA 500 1 1 4 1 WTA 250 1 1 3 1 Tournament Category Show  Courts Additional  Match Courts Practice Courts (on-site and  off-site) On-Site Practice  Courts WTA 1000 Mandatory 12-day - Joint 3 5 16 8 WTA 1000 Mandatory 9-day - Joint 2 5 14 8 WTA 1000 Non-Mandatory,  WTA 500 (56) 1 4 4 3 WTA 1000 Non-Mandatory,  WTA 500 (32) 1 3 4 4 WTA 250 (56) 1 3 3 1 WTA 250 (32) 1 2 3 1 iv. Availability For hard and clay court Tournaments, practice courts must be  available for use for practice by 8:00 a.m. the day prior to Qualifying  Sign-In, and match courts must be available for use for practice by  8:00 a.m. the day of Qualifying Sign-In. For grass court Tournaments,  307