Congo and Zambia shared the spoils in their 2017 AFCON Group E qualifier on Sunday.
The two sides had played to a 1-1 draw on Wednesday in a match many Zambians had banked on a win.
Jordan Massengo opened the scoring for Congo in the 48th minute before Winston Kalengo levelled matters for Zambia in the 72nd minute.
The result sees Congo take second spot in Group E while Zambia are third, level on points with their opponents. Guinea Bissau go top of the table after beating Kenya 1-0, leaving the Kenyans out of contention.
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The game was marred by a riot as fans threw missiles and police fired tear gas into the stands.
The unrest broke out when a goal was awarded to Guinea Bissau after 81 minutes, with Kenya’s players arguing the ball had not crossed the line.
Play was halted for 30 minutes as Kenya fans threw missiles at the Guinea Bissau bench and the fourth official. Kenya could face sanctions.
The AFCON 2017 will be staged by Gabon early next year. The last qualifying matches would be played this week to determine which countries make it to the continental showpiece.