The defeat, the second in four days leaves Hans Van Der Plyum's under pressure after losing 3-0 to Aduana Stars on Thursday.
Arsenals' Mohammed Abdulai scored the match winner a minuet before the hour mark at the Golden City Park as it lifted them off the foot of the table to second from bottom..
The champions are now 10 points off the summit of the Glo Premier League and are placed sixth.