McLaren's growing frustrations with Honda erupted on the eve of the Canadian Grand Prix when its executive director Zak Brown said his outfit had "serious concerns" about them ever being able to win together.

This has prompted fresh speculation that McLaren could move to end its partnership with Honda early and switch to either Mercedes or Renault engines from 2018.

Sauber team principal Monisha Kaltenborn said in Montreal that she was aware of McLaren's latest remarks, but insisted that they did not cause any undue alarm about its own situation for next year.

"We are not getting into that situation there, we have our own," she said, when asked by Motorsport.com about Brown's stance.

"We will have our own project with them [Honda]. I have no reason to doubt that, because from what we have seen, we are confident they will get their act together.

"They have the people, they have all the tools you need to do that and we still at least have some time. We all don't even know what is going to happen in this race, so how do we know what will happen at the first test in 2018?"

One of Honda's reasons for doing the Sauber deal was to help increase its potential mileage – as having two teams should allow it to double the amount of running and data gathering.

That advantage would be gone if McLaren ended the Honda relationship. But Kaltenborn said that it would make no difference to her outfit whether McLaren chose to stay or not.

"We have no preference because it doesn't really affect us," she said. "They are two projects and there is not going to be any joint development there or anything like that.

"It is like now with Haas, with Ferrari and us. If there was another team or not, it doesn't really affect us."

She added: "When we entered into this, there were going to be two customers and we are going to be one of them.

"It is more, I would imagine, from Honda's perspective. The more you have, the more mileage you can get, the more data you can get, the better it is for your development."