Antonio Pizzonia will once again drive for Williams at this month's Belgian Grand Prix after Ralf Schumacher failed to recover from injury.
Schumacher has been sidelined with a back injury since the United States Grand Prix in June when he crashed heavily into a wall at Indianapolis.
Pizzonia replaced Schumacher in the last two races, scoring seventh-place finishes in Germany and Hungary, and will continue alongside Juan Pablo Montoya in Belgium on August 29th.
"Ralf has not been cleared to drive yet, so Antonio will once again be driving for us at Spa," technical director Sam
Michael said in a team preview.
Spanish test driver Marc Gene had initially been pencilled in to deputise for Schumacher but failed to score points in the
French and British Grands Prix.
Williams are fourth in the constructors' championship with 54 points, although Ferrari have already been crowned champions having amassed 202 points.