Elmina Sharks edged Hearts of Oak 1-0 at the Cape Coast Stadium on Sunday in a friendly.
An 87th minute howler by goalkeeper Benjamin Mensah gifted Benjamin Tweneboah the only goal of the match.
Mensah kicked the air and Tweneboah, lurking around, calmly slots the ball into the empty net.
It was the first match for Hearts of Oak at the Cape Coast Stadium since announcing the venue as their adopted home ground for the upcoming season.
Both Hearts of Oak and Sharks are preparing to play in the Ghana Premier League which has delayed.