Arrivabene: You cannot tell Kimi what to do

July 31 is a date etched into the diaries of Ferrari and Kimi Raikkonen when, according to Corriere dello Sport, Ferrari's 'option' to extend the Finnish driver's current contract runs out.

"I'm not worried about it at all. Time will tell," Raikkonen said recently, but he made that comment before team boss Maurizio Arrivabene warned him to improve his qualifying form, and also before the spin that cost him a podium in Canada.

"As I said, it's dependent on the results," Arrivabene is now quoted by F1's official website when asked if Raikkonen will stay in 2016. "If he is achieving the objective that I gave to him - why not?"

Speculation is mounting that Valtteri Bottas and Daniel Ricciardo are at the top of Ferrari's shortlist in the event Raikkonen does not stay.

Red Bull, however, insists it has a "bulletproof" deal for 2016 with Ricciardo, while it is also believed Williams can automatically keep Bottas by triggering a contract option.

"It's too early to say," Bottas said recently when asked about his future. "At the moment I am completely focusing on getting the best results at this team (Williams)."

According to some sources, Ferrari's most likely course of action will be to hang onto Raikkonen in 2016 and wait for Bottas and Ricciardo to be on the market. But Arrivabene said Ferrari will never be short of options.

"I am concentrating on our two guys right now and I know very well that if needed you can have a driver that is ready to jump in a Ferrari any minute," he said. "That is not a problem."

Arrivabene said in Canada that he is working to get the most out of Raikkonen. Before July 31 arrives, there are only three grands prix - Austria, Silverstone and Hungary.

"You cannot tell Kimi what to do," Arrivabene admitted, "instead you have to talk to him and show him that you trust him, because sometimes he is his own greatest enemy. But if you show him that you trust him 100 per cent, then he can give you 120 per cent in return."

Raikkonen, meanwhile, sounds keen to keep his job in red when he told Canal Plus, "There are many good teams in F1 but Ferrari is different."

"I think the team this year is the best I've been in, how it works, all the atmosphere, like I said, Ferrari is Ferrari. You would always choose it if you can," added the 2007 F1 world champion.