Helmut Marko has fired Max Verstappen a ‘naïve’ warning as the Red Bull driver looks to hold off McLaren rival Lando Norris and win his fourth championship title in a row. The Dutchman has dominated Formula 1 in recent years but Red Bull have lost their way this season. An upgrade to the RB20’s floor edge set the team from Milton Keynes back and only at the Azerbaijan Grand Prix last time out could Red Bull find more pace with a revised floor. But while Sergio Perez was more comfortable with his RB20 in Baku and fought for a podium place, Verstappen often moaned at the Azerbaijan GP of balance…