Sarri's best decision tonight was to replace Pjanic. Not because the Bosnian was terrible, but because he had a mark on him and couldn't do shit. After that we became less predictable and Lyon got tired.
Still, Sarri most of all, but also Rabiot and Bentancur, should have reacted sooner to the situation. They had a mark on Pjanic and nobody tried to do anything about it. Even in the 15 minutes after the break.