Ghana International Kelvin watched on from the bench when league contenders Dortmund continued their good run of form away to Fortuna Dusseldorf at the Merkur Spiel-Arena.
Erling Haaland scored the only goal in the game at the stroke of full time finishing off from an Akanji assist.
The defeat takes Ofori’s Dusseldorf 16th on the Bundesliga league table with 28 points after 31 games.
Fortuna Dusseldorf faces a battle of relegation which makes their next game crucial when they travel to RB Leipzig in midweek.