Barcelona: A happy Lewis Hamilton topped the times in both sessions yesterday as he and his Mercedes teammate Nico Rosberg dominated opening practice for tomorrow's Spanish Grand Prix.

Lewis Hamilton
Lewis Hamilton 

The Mercedes pair were fastest overall at the end of the afternoon with Hamilton setting the pace and reveling in his form and his role as a settled senior member of the German outfit. His speed, he said, showed he was in "a good place".

He said: "It really means a lot to me to feel that I am an integral part of this team and I love the huge energy that goes into the car and working with the engineers.

It gives me a really special feeling. These guys, the engineers, they can do anything and it is up to us to help by 'steering the bubble' and me and Nico, we do it together."

Defending four-time champion German Sebastian Vettel was reduced to only four laps early in the morning session after his Red Bull car was halted by electrical problems.

This required a replacement of the wiring loom and he missed the afternoon session entirely.

Ricciardo third fastest
Australian Daniel Ricciardo wound up third fastest for Red Bull, nine-tenths of a second slower than 2008 champion Hamilton. The Ferrari pairing of Fernando Alonso and Kimi Raikkonen took fourth and fifth places.