Kimi Raikkonen says he is "positive" that he will have a more competitive weekend at the Russian Grand Prix.

With Fernando Alonso retiring in Japan, Raikkonen struggled to 12th place and said he "couldn't understand" handling difficulties with his car. Asked on Thursday in Sochi if Ferrari had got to the bottom of his problems, Raikkonen replied: "No, not really.

"We had a difficult qualifying [in Japan], obviously we had a problem in the morning so we didn't get the exact set-up that we wanted. In the race it was tricky with the tyres, we couldn't get them behaving as we wanted. So let's see; I'm positive that it's going to be much better here but obviously we have to wait and see."

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With the F1 paddock still focused on the health of Jules Bianchi after his crash in Suzuka, Raikkonen said he doesn't believe it is his place to wade in to any debates over driver safety.

"Obviously I don't want to comment on anything or say what was wrong or what was right, that's not my job. All the thoughts are with the family of Jules and with him. As a team we try to do a good race for him here and all the rest is pointless to speculate or talk about. It's a very unfortunate thing and you never want to see those things happen but unfortunately in sport certain things go wrong and the end result can be very bad."