From this year's WTA Handbook... D.6.c. If eligible, a player’s 1st round match in a Premier Tournament may be postponed one (1) day (until the second scheduled day of Qualifying) due to her singles or doubles participation in the previous week’s WTA Tournament. d. If eligible, a player’s 1st round match in an International Tournament may be postponed one (1) day (until the second scheduled day of Qualifying) due to her singles or doubles participation in the previous week’s WTA Tournament or $100,000 through $75,000 ITF Women’s Circuit event. The match must be scheduled on the second day of Qualifying by 12:00 noon tournament local time or the first scheduled match, whichever is later, and the player may be required to play two (2) matches on the second day of Qualifying.