Pirelli took the first step of its return to Formula One when Nick Heidfeld completed a two-day test at the wheel of a Toyota TF109 yesterday (Wednesday).

Heidfeld sampled prototype versions of Pirelli's PZero tyre which will be used from next season onwards under a three-year agreement with the FIA.

The objective of the test, which was held in largely dry and sunny conditions at the Mugello circuit, was to begin the process of determining the front and rear tyre profile and construction that will be used as the basis of the new Pirelli PZero F1 tyre.

Pirelli's Motorsport Director, Paul Hembery, explained: "This was the first step of our return to Formula One and we are very satisfied with how the tyres performed and the information we were able to collect. We concentrated on finalising the profile and the construction of the front and rear tyres, which is a process that we will continue over the next few tests that we carry out.

"Mugello has quite an abrasive surface with long and medium-high-speed corners as well as hairpins and quick changes of direction so it is quite a good proving ground. We are on target and we come away from this test with lots of data to analyse, which is exactly the situation we hoped to be in."

Pirelli's testing programme began less than two months since its agreement as the sole tyre supplier to the Formula One World Championship was finalised, a feat Hembery was quick to acknowledge.

"A lot of people have made a big commitment to get to where we are today in a very short period of time and the effort really has been incredible. The Toyota team has also been very professional and provided a good, reliable car and we are all very happy to begin our relationship with Nick Heidfeld who gave us a lot of good feedback and suggestions."

Pirelli will continue its development programme later this month.