Daniel Ricciardo admits it "has been surprising" to have got the better of team-mate Sebastian Vettel so often this year.

Having joined the team from Toro Rosso over the winter, Ricciardo has been quick to show his potential by often outqualifying the four-time world champion. Having taken his first victory in Canada - Red Bull's only win of the year so far - Ricciardo is currently third in the drivers' championship behind the two Mercedes drivers.

When asked if it had been a surprise to be beating Vettel on a regular basis so far this season, Ricciardo replied: "A little bit.

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"I came into the season knowing what I had around me and knew if I could use it all as I had hoped, I would generally be able to challenge Seb. Did I think it would be 6-2? Probably not. I knew if I got my stuff together I could challenge him, but to sort of get the better of him quite often on Saturdays and Sundays has been surprising."

And Ricciardo said his form compared to Vettel so far this season has given him "a lot" of confidence.

"My head is about to explode! It is good. I believe a lot in my ability to go out and do it and prove it does a lot for your confidence."

Ricciardo added that the praise from team principal Christian Horner was welcome, even if he tries not to pay too much attention to it.

"Yeah it is love isn't it? At the same time I don't read too much or listen to too much praise because otherwise you head may explode, but it is nice to hear that they are happy and you are fitting in well."