Aston Martin Team Principal Mike Krack says a potential fuel system issue was the reason for Fernando Alonso's slower pace in the latter stages of the Canadian Grand Prix.
The Spaniard finished the race in second position, but was told to save fuel late on in the Grand Prix, with Krack explaining that this was a precautionary measure.
"We thought we had a problem on the fuel system, but we were not sure, so as a precaution, we said the best is to save some fuel and to lift and coast," Krack told media, including RacingNews365.com.
"How much did it cost us? It's difficult to judge. A few tenths, probably one or two.
"It was a precautionary thing, but you can choose between not finishing, or arriving with a bit more [fuel], so we wanted to be safe."
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No issues with Alonso's brakes
Alonso's slower pace had prompted some TV commentators to suggest that the Spaniard was struggling with braking issues, with the Circuit Gilles Villeneuve being notoriously hard on brakes.
However, Krack poured cold water on those rumours.
"I was surprised as well to see that," said the Luxembourger.
"I think Lewis [Hamilton] was told we had a brake problem, and we looked at each other and said, 'They know more about our car than we do!'
"No, we had no problem with the brakes."