McLaren enjoyed a largely positive season, finishing fourth in the constructors' championship and Lando Norris believes that the improvement in performance is down to the aerodynamic part.
"Downforce, it's as simple as that. Downforce is always the most important thing, it's one of the things that improved the most since last year," Norris said as quoted by Car and Driver.com
"It is not only about having more aerodynamic load, but also efficiency, characteristics of the car, etc. The car still needs to work in different conditions, different types of curves and speeds.
"There are still things in our hands, such as pit stops, driving, that we need to improve and our efficiency in how we want to work as a team. "
With both drivers remaining the same at McLaren for next season, it gives the team so real continuity and a chance to build on the success that was had this season.