The big mistake was Nunes on the first PSG goal diving in, which totally exposed our right side. That first goal for them was so important. He does not do the basics and makes crucial mistakes at key moments.At 2-0 your first duty is to defend and not to expose yourself to PSG's pace in transition. Some players understand their role in key game situations, others make the same mistakes and do not learn from their errors.It is the difference between a top player and an also ran. I expect him to be dropped for the next game as these sort of mistakes are not acceptable at the top level. If we had not conceded so early after our goals, there would at least have been a chan̈ce of getting a crucial draw.