The victory gave Mumbai three points and enabled maintain fourth spot, while Jamshedpur FC are out of the reckoning.
ATK MB's first real opportunity of the game came midway through the first half when Boumous broke free on a counter-attack, shrugged off a challenge from Wangjam and managed to get a shot on target. Gurpreet Singh Sandhu, however, got a strong hand to the strike and parried away.
Star Uruguayan striker Diego Forlan struck a late goal as Mumbai City FC ended Atletico de Kolkata's unbeaten run with a 1-0 victory and jumped to the top spot in the Indian Super League football in Kolkata on Tuesday.
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