Romain Grosjean has denied that his increasingly outspoken tone on the radio is revealing a loss of patience with the Haas team.

The Frenchman has been struggling with car problems at recent races towards the tail-end of Haas's first season on the grid, and Grosjean has not been shy to voice his discontent over the radio.

When asked about it, Grosjean said at Suzuka: "I know that my messages occasionally seem a little aggressive, but they just reflect my passion.

"It's nothing personal. I'm not a Finn, I'm more emotional but I'm actually a nice guy as I think people know. But you also know that I push myself to the limit.

"I cannot just tell the team that the car is bad. I want to get them to act, and to do this you need to put into words the feeling that is sometimes not so easy. People who don't know me think that my attitude is wrong, but my team knows me better."

The 30-year-old is almost certainly staying with the new, Ferrari-linked American team for 2017.