The Viola were held 0-0 at home on Sunday.
But Prandelli said, “There were no spaces today, they didn't concede many goal scoring opportunities. We played a good game, but we missed something up front even if we recovered [Franck] Ribery.
“We play with a classic centre forward plus Ribery who is the support striker, midfielders must help, they didn't do it all the times today. Sometimes we struggled with counterattacks and in the final 20 minutes we could do more to be dangerous in the penalty area.
“[Christian] Kouame must make those movements, he did well. I am happy with his performance, we played a good game, we remained balanced."