Spyker boss Colin Kolles has refuted claims he has destabilised the team by changing his driver line-up for the second successive race.

Sakon Yamamoto will partner Adrian Sutil throughout the Hungarian Grand Prix this weekend after Markus Winkelhock drove the car in the European Grand Prix 11 days ago.

Winkelhock had replaced Christijan Albers in the race seat at the Nurburgring due to non-payment by one of the Dutchman's sponsors.

Winkelhock went on to make history, enabling Spyker to lead a race for the first time.

That was courtesy of a torrential downpour at the start of his home grand prix in Germany, although his glory was shortlived as he retired on lap 18 with hydraulic failure.

The more experienced Yamamoto, who raced for Super Aguri in the final seven grands prix of last season, has now stepped into the breach.

Defending his decision, Kolles said: "I don't think what we have done has destabilised the team.

"Anyone who came to the Nurburgring saw the impact Markus had - we had more TV and press coverage than ever.

"We also led the race - for the first time - so clearly it has had no impact on the race track.

"I think with Sakon it will be the same - although we are not expecting to lead again. Those were exceptional circumstances."

They were also very gratifying circumstances for Kolles, and what he hopes is a step in the right direction for his team, especially with a new car expected from Turkey onwards later this month.

"We might have been lucky with the weather, but we got the strategy exactly right, which was not down to luck," added Kolles.

"Markus also had a very controlled drive, which shows when all things are difficult, we can be on top of it.

"When we get the new car, who knows what will happen if the same situation occurs again."

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