May 9 Raffaele Marciello is determined to make his mark in 2015.

The Swiss-born Italian is now the cream of Ferrari's development programme.

This weekend in Barcelona, the 20-year-old is splitting his time between a 'Friday' practice programme for Sauber and his GP2 racing duties.

And next week, he will re-emerge for the post-race Barcelona test.

"I have to prove to those who decide that I am ready for the big jump," he is quoted by La Gazzetta dello Sport.

2015 is Marciello's second year in GP2, and he said the time is now to leap into F1 rather than take too long to win the title like champions Fabio Leimer and Jolyon Palmer.

"There are drivers who took four or five seasons before they won," he said, "but I think that if you have the potential you have to show it within a couple of years."

Meanwhile, it is reported that F1 backmarker Manor will not be present for the post-race Barcelona test next week.


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