Pirelli has announced that Romain Grosjean will replace Nick Heidfeld as test and development driver for the 2011 F1 tyre following the German's move back into a race seat with Sauber.

Heidfeld conducted his final test with Pirelli this week at Jerez before his contract with Sauber gets underway on Friday, and completed nearly 200 laps over two days of running at the Spanish circuit.

Continuing to work on the final development of Pirelli's tyre construction, Heidfeld also tried out a range of different slick compounds during the two days but having elected to go back into a race seat, he will now be replaced by former Renault driver Grosjean for next week's test at Monza.

"We'd like to thank Nick for his very valuable contribution to our tyre development programme and we wish him all the best for the future," Pirelli Motorsport director Paul Hembery said. "In order to avoid favouring any individual team, we have jointly decided to release Nick from his contract and now we have chosen Romain to test for us in Monza. He's packed a lot of experience into a short space of time, including all our GP3 tyre development, so I'm sure he'll be able to give us some very useful feedback.

"The tests here at Jerez have gone extremely well and we completed all the work that we planned over the two days. Now we move onto Monza, where our task will be to finalise the construction before we focus further on compounds."