Max Verstappen says he is expecting an "interesting battle" to play out between the top three teams in Singapore, as Red Bull, Ferrari and Mercedes were all covered by a little under four-tenths during second practice.
Verstappen, who topped the opening session by almost half a second, was third quickest in the second session behind Nico Rosberg and Kimi Raikkonen, but believes Red Bull can close the gap after struggling a little during the evening session.
"It was a positive day for us and we can be happy with the balance of the car," he said. "For FP2 we weren’t fully there but we know what areas we need to work on and improve.
"The car felt good, we are more or less there and we had a good start to the weekend.
"I think it will be an interesting battle between us, Mercedes and Ferrari, and I’m looking forward to it," he added.
Team-mate Daniel Ricciardo was just 0.025s slower than Verstappen and despite a small mistake which saw him clatter a barrier, he is confident in Red Bull's pace and his own ability to find extra pace on Saturday and Sunday.
"This circuit is always difficult. You’re pushing the limit on a street circuit and you want to be comfortable in qualifying so today is the day to experiment," he said. "I had a bit of a spin and touched the barrier but the car was more or less okay.
"It’s hot, it’s tricky and everything is a little bit on the edge here for sure, but to find a few tenths on this circuit can be quite easy, because there are so many corners and with the tyres overheating in the last sector you can lose or gain a lot.
"We still feel that we can get a little bit more speed out of the car so that’s what tonight is for. Even if we find a few small things, then they will hopefully add up to quite a bit of lap time here tomorrow."
