LONDON, Feb 26 : Formula One champions McLaren will start the season next week "playing a bit defensively" with Ferrari and Mercedes expected to be setting the pace, team boss Andrea Stella said on Thursday. McLaren are defending both titles this year after Britain's Lando Norris ended the four-year reign of Red Bull's Max Verstappen. The Woking-based team will be chasing their third successive constructors' title. Stella said McLaren were satisfied with how testing had gone over nine days in