Right-back Habib Beye stayed behind on Tyneside on Saturday, as did Michael Owen, having been pulled out of the Hartlepool game as a precaution.
Keegan: "Beye's very fit, but he just felt a little twinge on Thursday, and we just decided to pull him out until Monday.
"It was the same with Michael Owen. He felt a little twinge, and we pulled him out about eight or nine days ago.
"There's just no point risking them at this stage."