Edinson Cavani gave the home side the lead when he met a Lucas Digne cross with a header on 20 minutes. However, Samuel Umtiti struck with six minutes of normal time remaining to earn a share of the spoils for the visiting OL.
Earlier in the game, Yohan Cabaye wasted a good chance to open the scoring when he sliced wide with goal at his mercy after good play involving Zlatan Ibrahimovic.
Arnold Mvuemba nearly evened things up towards the end of the half, but his free kick could only find the woodwork with Salvatore Sirigu beaten in the PSG goal.
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