Christian Horner says Red Bull needs "something different" to happen at one of the remaining six races in order win again this season.
Red Bull won the Spanish Grand Prix when the two Mercedes collided, but despite coming close in Monaco and Singapore the team has not won a race since. Singapore represented one of the team's best opportunities but Daniel Ricciardo finished 0.4s off Nico Rosberg as they crossed the line.
Asked if he thought Red Bull could win another race this season, Horner said: "Daniel got pretty close in Singapore, he got within half a second and we beat one of the Mercedes fair and square. Hopefully opportunities will present themselves over the remaining six races but Mercedes have been so strong at every venue, it's going to rely on something different happening. Weather conditions, tyre deg, something like that."
Horner said Red Bull did everything possible to win in Singapore, but ultimately Rosberg proved too fast.
"I don't think so. Nico had a very strong weekend. And he had a bit too much for us in qualifying, and in the race. We tried everything we could. We tried a different strategy at the end of the race, which forced them to stick to the two stop.
"And whilst Daniel did a fantastic job to close Nico down over the last laps, they just left enough in hand to keep a margin to the chequered flag. So to get within half a second after two hours was a great performance, but today it was not quite enough."