Aug.30 (GMM) As well as improving the F10's pace and fending off the World Council's wrath next month, another headache for Ferrari could be in the engine department.

The next race, Monza, is among the toughest on engines, and at Spa-Francorchamps on Sunday, the newly-installed Ferrari engine in Pedro de la Rosa's Sauber had to be replaced.

With seven races to go, the unscheduled change tipped the Spaniard over his allocation of eight engines for the season, resulting in a grid penalty.

And a cursory look at the allocations of F1's other cars at Spa shows that while most drivers are now on their fifth new engine, Ferrari's Fernando Alonso and Felipe Massa have used six.

"I see no reason to worry," said Ferrari team boss Stefano Domenicali.

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