Aisam and Haase beat America's Nicholas Monroe and New Zealand's Artem Sitak 6-1, 6-2 on red clay.
Earlier, the top seeds had defeated Britain's Colin Fleming and Jonathan Marray 7-6 (2), 6-3 in the semi-final.
It has been a tough year for Aisam who began the season with Serbian partner Nenad Zimonjic. But the partnership did not last.
At last month’s Estoril Open in Portugal, Aisam managed to reach the semifinals with Luxemburg's Gilles Muller.
With the win Aisam and Haase have bagged €64,000 at the ATP 250 tournament.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ