This. Burn was being roasted by Saka a good 5-10 minutes before he set up Lacazette's goal. It's not his fault that he isn't faster, and Bernardo offered him zero help. A decisive manager would have plugged that weakness somehow before the goal went in as it was blindingly obvious to everyone at home.
When chasing the game in the final stages we have two CBs playing wide either side. Never looked like delivering a decent cross. Burn or Veltman on the overlap is scaring no one.