The Finnish driver will be under increasing pressure to prove to Mercedes he is deserving of a seat at Mercedes beyond this upcoming season.
However, Russell admits he’s growing in confidence about his abilities after having a taste of driving in a Mercedes car.
“We often found ourselves outside of our position and struggled with faster cars, which of course makes it tricky because I’m always on the defensive,” he told Motorsport-Total.
“It only happened once that I was on the offensive. And that was when I was sitting in the Mercedes. It just changes your self-confidence as a racing driver.