The Viola are into the Europa Conference League semifinals after an extra-time 2-0 win in Plzen.
Kouame told Sky Italia: "We had to be patient, they are a closed team, the goal would be scored sooner or later.
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"In the first half we did well to crush them in their area, then the goal came at the end.
"Today Nico scored, he hadn't scored in a long time.
"Where can I play? Well, I play where the coach asks me to."