Reigning world champion Sebastian Vettel says he is pleased with the progress made by Red Bull.
Vettel was third quickest during practice for the Malaysian Grand Prix at Sepang on Friday.
"I think we had a good day, obviously Friday timings are not the most important thing in the world but it’s good to be up there and in range of the top guys," he said.
"I think we had a decent day, not a completely smooth day for both of us, there are still some things to solve on the software side and the programming, but that’s the way it is. I think we have to learn a lot but all in all, I’m quite happy."
Team-mate Daniel Ricciardo was seventh quickest and agreed that Red Bull learned a sufficient amount across the two sessions.
"I think we learned quite a lot about the short run pace this morning," he said.
"We were pretty pleased with the progress we made, but it could have been better with the long runs. I think we’ve got some room for improvement, but that’s what tonight’s for. Reliability was good today, so I think we’re pretty pleased with that. It’s always warm here, the humidity is probably the biggest challenge about this place, but it’s all good, you know, it toughens us up a little bit!"