Nico Rosberg has said that he found the conditions for qualifying at the Bahrain Grand Prix "challenging".
The German told reporters: "It has just worked well through the weekend, finding my way, making progress and getting through some issues.
"The challenge this weekend is that free practice were in such hot conditions, and you have to guess, sort of, for the cold conditions [for qualifying].
"It worked out well. I felt comfortable and got my laps together. I'm very happy. I have good memories of this track, winning the GP2 championship and starting my first race in F1. I enjoy coming here and again today, it's suited me."
Rosberg currently leads the drivers' championship.