APPENDIX F ROOF POLICY •  Changes to the order of play, including the completion of an unfinished  match on a different court than the one on which it started, may  be authorized in exceptional circumstances in the best interests of  completing a Tournament on schedule. •  If the roof must be partially closed in order for the lights to work properly,  then the roof must be partially closed prior to the start of the match. The  Supervisor will determine the exact time of day after which the roof will  be closed for this purpose. Darkness: Cold: • In the event the temperature is below 50F/10C prior to the start of a  match, in order to enhance the fan experience, the roof may be closed  as directed by the Supervisor. Decisions on whether to close the roof for  cold will be made on a match-by-match basis. 424