Bengaluru, the last edition runners-up, were outplayed by the Tajikistan side and would consider themselves lucky to have wriggled out of the away match without conceding too many goals.
The visiting side survived an incessant onslaught from FC Istiklol, the 2015 champions, but the home side's profligacy in front of goal saved Bengaluru from losing the match by a bigger margin.
Dmitry Barkov scored the only goal of the match in the 27th minute at the Hisor Central Stadium.
Interestingly, Bengaluru dominated the possession (63 per cent) but they could not string together a dangerous goal- scoring opportunity throughout the match. Bengaluru had two shots at target while Istiklol had seven.
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Winger Udanta Singh had a fine run down the flank early in the match and then Lenny Rodrigues had a chance to test the Istiklol goalkeeper from a free kick. But after that it was Istiklol who dictated terms on their opponents.
Bengaluru defence did better in the second half and there were not many shots from Istiklol as compared to the first session.
Bengaluru now host Istiklol in the second leg on October 18.
Bengaluru had beaten 4.25 SC of North Korea 3-0 on aggregate in the Inter-Zone Semifinals.
The winner between Bengaluru and Istiklol will face defending champions and West Zone Finals winners Air Force Club of Iraq in the grand finale on November 4.
Disclaimer: No Business Standard Journalist was involved in creation of this content