Like Kotoko’s big January signing Vinicius, Dwarfs’ Japanese acquisition Jindo Morishita was relegated to the bench.
In the ninth minute, Kotoko defender Imoro Ibrahim tested Dwarfs goalkeeper Razak Issah with a shot, six minutes before goalkeeper Razak Abalora was forced into a save by Elia Kofi at the other end.
Habib Mohammed then made another attempt to get the Porcupine Warriors the opening goal but his shot from outside the box missed the target by a whisker.
Dwarfs broke the deadlock in the 25th minute when Korsah smashed a shot from outside the box into the net after a shortish free-kick was rolled onto his path.