Ahead of Chelsea‘s meeting with Barcelona in the UEFA Champions League, the prematch comparisons between teenage phenoms Estevao Willian and Lamine Yamal felt premature. They don’t now. Chelsea’s 3-0 win on Tuesday was the night when 18-year-old Estevao announced himself on the world stage, capped with a stunning goal that put his fellow young winger firmly in the shade. Of course, 18-year-old Yamal…