Emery believes that the French side would have progressed had VAR been in use, whilst also adding that he and his players had a battle against the referee as well as against the Catalans.
"We had two games in the 6-1 against Barcelona," Emery told Marcador.
"One against Barcelona and the other against [Deniz] Aytekin.
"With VAR we definitely would have come through that tie."
When asked about the best player he worked with, Emery listed a number and stressed that he's had the pleasure of coaching so many elite players.
"Then I went to PSG and I had a player like [Kylian] Mbappe and, above all, Neymar."