Co-Captain Parker has been absent from the Palmer-Dixon courts this week due to illness.
"It looks like Eliza is well enough to play, so that's what we're going on," Graham said last night.
As for Roiter, this weekend is full of promise as well.
"Kate's been picking things up lately, and her game's much more consistent," Graham said. "She has the potential to make it to the quarters or semis this weekend if she plays well."
"I feel like I've been hitting the ball pretty solidly lately," said Roiter. "My serve has also improved a lot this week, and that would really put me on the offensive rather than the defensive."
"Hopefully I'll play aggressively, stay focused, and be on top of my game," she said.
The tournament will feature 64 singles competitors and 40 doubles teams representing the best of the East.
Top seeds in the singles draw hail from Syracuse, Virginia, and William and Mary.