Sochi (Russia), Oct 9 (IANS): After his controversial outburst at McLaren was broadcast live at the Japanese Grand Prix, Formula One driver Fernando Alonso has said that the sport's radio messages should stay between driver and team.

The Spaniard was heard screaming 'GP2 engine' during a disappointing race in which he finished 11th and was criticised by McLaren boss Ron Dennis afterwards.

Alonso believes it is a unique situation drivers are dealing with in the sport and his teammate Jenson Button will be experiencing the same level of frustration.

"We've been all season very positive about the team and about the car," Alonso was quoted as saying by the Daily Mail on Thursday ahead of the Russian Grand Prix.

"We've faced some difficult times, some tough times, and when you talk on the radio it should remain private, because you are talking with the team, not in public," he said.

"As I say, we've been very, very positive all the time; sometimes it's normal and understandable talking to the team, the level of frustration that I have racing, and Jenson has as well," he added.

While Button has signed on for another year with the struggling Honda-powered unit, Alonso -- who penned a three-year contract in 2015 -- threw his future into doubt following the race in Suzuka, Japan GP after replying 'I don't know' when asked if he would be on the grid next year.

But Alonso has now moved to quell McLaren supporters' doubts by insisting he will '100 percent' be with McLaren in 2016, and 2017.