Pirelli has done a great job, says Button

Jenson Button has praised Pirelli for doing 'a great job' with its new tire compounds, explaining that the company's target of increasing temperature operating windows has been accomplished. The McLaren driver, who topped the opening day of pre-season testing at Jerez, says optimal lap times are now much easier to achieve.

"It will be tricky again in terms of laps and degradation, but Pirelli has done a great job getting a wider range for the tires," Button told the official Formula 1 website after driving the MP4-28 for the first time. "One thing that I have noticed – you are able to go fast immediately, even on lap one. That is something that we couldn’t do last year."

Button also mentioned the high level of degradation he experienced on Tuesday, with Pirelli vowing to remove the possibility of one-stop races throughout the 2013 season.

"When I ran the Super Soft doing some basic installations I was graining the tires after one lap, so yes, this compound deserves the name Super Soft!" he added. "We also ran the Medium and Hard tires and it’s a different feeling compared to last year."

Button, who has brought his motorhome to the Circuit de Jerez for the duration of the test, will be back behind the wheel of McLaren's latest design on Wednesday.