Robert Kubica's engineer Kevin Struyf believes crashing is the only way for the ex-F1 star to learn and really develop as a top rally driver.

The Polish hero inflicted substantial damage to his Citroen DS3 RRC when he rolled on SATA Rallye Acores last Friday - less than a month after a crash put him out of Rally Islas Canarias El Corte Ingles.

Having led the event until he got caught up in heavy fog, Kubica eventually finished a creditable sixth overall.

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"We are not disappointed because when the driver arrives in a rally it's quite normal to make a mistake," said Struyf. "It's impossible to arrive in rally and to make a very good pace without making a mistake.

"Robert had a very impressive pace. He made seven fastest times and was leading the rally. That is the most important thing to keep in mind. He has to work a little bit to be more constant but it is all part of the learning," he added.