Exploiting rival goalkeeping lapses, Mumbai FC won their maiden outing by finishing on the right side of a 2-1 scoreline against former champions Mohun Bagan in the I-League on Monday.

Despite maintaining greater ball possession, Bagan had to eat an humble pie mainly due to the costly lapses of custodian Shilton Pal, who took his place under the bar as an injured Sangram Mukherjee had to stay away.