The Ivory Coast striker, 24, has already scored eight goals in 17 appearances since his £12million summer move from Vitesse Arnhem.
Yet only two of those strikes have come in the Premier League.
He said: "There is more to come. I have to focus on my fitness and work for the team.
"I felt good against Kuban. Scoring gives me confidence but the most important thing is to be fit, continue to work and get myself in better condition."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball