While the other F1 drivers take a weekend off, there will be no rest for Roberto Merhi.As he has not been signed up for the full F1 season by Manor, the Spaniard will kick off his 2015 campaign in the

While the other F1 drivers take a weekend off, there will be no rest for Roberto Merhi.

As he has not been signed up for the full F1 season by Manor, the Spaniard will kick off his 2015 campaign in the Formula Renault 3.5 series in Spain this weekend.

Beyond that, he knows he might not return to the F1 cockpit in Barcelona next month.

Merhi, 24, has admitted he will be sidelined if Manor signs up a better funded driver to be Will Stevens' full-time teammate.

Not only that, Merhi has struggled notably in 2015.

After Bahrain, he said: "I don't know. I felt like something was missing: top speed, traction, the front of the car and it was very easy to make mistakes.

"We will have to see, because I don't think this is the way to continue," he is quoted by Spain's El Confidencial.

"I have been consistent, yes, but consistently slow. I would rather be ahead and finish only once.

"We have many problems," Merhi added, "and we have to work on that, because there are too many differences with my teammate which is a bit rare (for me)."

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