Daniel Ricciardo is confident Red Bull can challenge Mercedes over the course of the 2017 season.
Red Bull have made a low-key start to testing in Barcelona, with team principal Christian Horner saying a few "niggling issues" have held them back slightly.
But the RB13 has shown good straight-line speed so far, and Ricciardo is optimistic about the season ahead.
"We can beat them," Ricciardo told Sky Sports News HQ.
"We've got the same set of rules as everybody else so there's no reason why we can't across the course of the season.
"Mercedes can, as they have the past few seasons in Winter Testing, come out strong and reliable, which I think we all expected.
"The rules are different, but they're not so different that Mercedes were going to drop from first to fifth.
"We expected them to be quick – we're still not sure how quick we are or how quick Ferrari are."