Kevin Magnussen drove in Fernando Alonso's place on Saturday © Sutton Images Enlarge

Kevin Magnussen says he would not feel fully prepared to race for McLaren in Australia if Fernando Alonso is declared unfit for the season opener.

Magnussen deputised for Alonso during the final test in Barcelona as the Spaniard continues to recuperate after being knocked unconscious during a crash last Sunday. Alonso is yet to be cleared to race by doctors, though McLaren remains confident he will be given the all-clear.

Were Alonso deemed not fit to race reserve driver Magnussen would step into the breach but, with just 39 laps under his belt in the MP4-30, the Dane says he would not feel fully ready.

"I think it would be difficult because I've not really had my own team of engineers and mechanics to talk to all winter," Magnussen said. "I've kind of been on the sidelines a little bit. I've followed what was going on and kept up to date with it but it's different when you have your own team and you can go there every day and work with them and prepare like that. So it would be difficult but, if I have to, then I would be very happy to do it."

Racing director Eric Boullier says McLaren expects to find out Alonso's fitness soon and is confident the Spaniard will be cleared.

"As soon as the green light is given by the doctors which should be next week. Sorry but it's not in my hands. There is nothing wrong but I just think there is a final check to be done and the green light should be given."

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