The Kumasi-giants are without a defeat in eight games since new manager Steve Polack took over in May.
“Our win against Hearts of Oak was a great one, but we’re going to put it at the back of our heads and plan towards the game against Medeama," Sadick told the club's website.
“We’re determined after the victory and I believe it will motivate us because such victories aren't common. Everyone is concentrated for Sunday’s game and hopefully, we can secure all three points against Medeama despite their impressive record here.
“We have to play our normal game, although, it's going to be a tough game. However, at the end of the day, we shall be victorious no matter what. We have to maintain the winning ways in order to be able to achieve the target set for us.
“The supporters want us to make them proud always and it is a huge task so we need to clear Medeama out of our way before we even think about the next two games which also include Hearts,” he added.
Kotoko sit fourth on the log with 32 points, eight points behind leaders Wafa, who travel to Obuasi to lock horns with rejuvenated Ashanti Gold, who have won their last four games on the road to move out of the relegation zone.