Daniel Ricciardo hails one his best Friday's of the season at the Japanese Grand Prix.

Following the announcement the 24-year-old will replace countryman Mark Webber for 2014, Ricciardo's form has been indifferent.

Showing good pace in qualifying the hard work has been undone with two crashes at the last two races in Singapore and Korea.

However speaking after putting his Toro Rosso into the top 10 in both sessions on Friday, the man from Perth was very pleased.

"I’ve been hoping to have a Friday like this one for a while now," he said. "Of course, it’s the Saturday and Sunday that’s important."

One aspect that particularly excited the Australian was how the car developed over the course of the day.

"Today, we made progress with each change we made on the car, keeping each modification and then moving further forward," he said.

"On my long run on Option (tyres), it started quite well until I ran into traffic, but in general the pace wasn’t looking too bad – definitely a positive Friday for us."

As for his team-mate Jean-Eric Vergne, the Frenchman also had a productive day but admits some improvements still needs to be found.

"It was a trouble free Friday and we worked to our usual program, working on the car set-up and balance," he explained.

"I have to say I am not yet happy with it, mainly having some difficulty with understeer. However, it was an encouraging day. I did long runs on both tyres and although I didn’t get a clear picture from the Prime (tyre), the Option (tyre) was good."

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