You have 2 options to deal handle playing matches early:
1. Change the date in the “edit schedule” link to the new date/time when you are playing it.
2. Activate “rain mode” for the match lineup (only available after you create a lineup) and this way each line can specify their date/time and location. Here are the details for this feature: http://blog.tennispoint.com/2009/09/24/rain-mode-available-now/