Red Bull team principal Christian Horner admits that his outfit heads to next weekend's Canadian Grand Prix wary of the challenges presented by the Circuit Gilles Villeneuve.
The emphasis on top speed has meant that Red Bull do not traditionally run well at the track, with Sebastian Vettel's win in 2013 being their sole success at the circuit.
"Montreal is going to be a challenging race for us and it will be interesting to see how we perform there," he said.
"Obviously Renault will be working hard behind the scenes. We were much closer [in Monaco], the first time we’ve raced Mercedes this year, down to pace, particularly in the last third of the race it was the quickest car on the track. So we can take a lot of confidence out of that but we are going from one extreme to the other. Here it's all about handling characteristics, next even it will be about straight line performance."
Horner insists that Red Bull is clearly second best to Mercedes, but is waiting on Renault to make the necessary improvements.
"We’re clearly the second quickest team at the moment," he said. "We are very much in Renault’s hands and I think that we all are making progress, they’re making progress, Total on the fuel side have been making progress but really we are now where we could have been in January. It’s still a long way and Mercedes isn't obviously standing still but we are only at race six and it’s still a long way to go in this championship."
Reigning world champion Sebastian Vettel endured a difficult race in Monaco as he retired early on with turbo issues.
His failure to finish leaves him in sixth in the championship, but Horner is sure that his driver will bounce back from such problems.
"The weekend was pretty tough on him and, you know, he’s doing nothing wrong," he said. "He’s smart enough to recognise that but of course by being a sports man he’s going to be frustrated when things goes wrong. But he never gives up, he will just keep his head down and keep working harder and harder."