Daniel Ricciardo's relationship with Red Bull continues to become increasingly strained, with the Australian racer hinting he could leave the team.
Ricciardo's frustration with Red Bull has been heightened after he could not capitalise on his debut pole at Monaco last weekend, with a botched pit-stop costing him victory.
All three of Ricciardo's career wins came in the 2014 season and, although he is contracted to Red Bull for another season, the 26-year-old has suggested he may seek an early exit.
"The only interest l have is with a world title," he told Sky Sports, ahead of this weekend's Canadian Grand Prix.
"If Red Bull said we can't give you that for the next few years then the only place l would want to go to is somewhere they can say 'yup, you can fight for a world title with us'.
"That's all that l really want to fight for. I'm not interested in being with someone for an image."
Speculation about a possible switch to Ferrari is likely to intensify as a result of Ricciardo's latest comments, with Sebastian Vettel welcoming the potential move despite his Red Bull contract ending a year early after his youngster team-mate outperformed him.
"I raced with him in 2014 and we didn't have any problems. And l knew him before that. But it's not my decision," the German said.
"I don't mind, he's a strong guy, l like him. He had a good season in 2014, last year and this year has been difficult to judge because you don't know what happens internally, but from what l know he is a good guy."