The last time a manager was caught overthinking against Chelsea, they lost their Champions League final. Carlo Ancelotti could be on his way to making that same mistake.
It's unlike the Italian to freeze and make mistakes on the big stage. He has won Europe's most elite competition three times after all. The only manager to do so in different clubs if I may add.
However, Pep Guardiola was unable to unlock Chelsea's puzzle last season after overthinking his starting lineup. Being one of the greatest managers in the game, it just goes to show that anyone can mess it up at the last minute.