ESPN rounds up all the reaction from up and down the Sochi paddock following Friday practice for the 2017 Russian Grand Prix.
Mercedes
Lewis Hamilton: "Bit of a difficult day for us. We managed to complete everything that we needed to do on our runs, but in terms of the balance of the car, the Ferrari seemed very, very fast on the long runs, so we need to work out how we can improve our pace. But there's still everything to play for. The tyres feel very peaky, so it's easy to drop out of the window of performance.