Max Chilton reinstated for Marussia
Marussia announced on Thursday that Rossi was taking Chilton's seat at Spa because of ongoing contractual problems.
But on Friday morning race stewards accepted a request from Marussia to change its nominated driver back to Chilton.
However, Rossi was set to drive in Friday's first practice session instead of Chilton, who was expected to be back behind the wheel for the second practice session in the afternoon.
Copyright 2014 by The Associated Press