A win for Ivory Coast or Tunisia, who clash on Saturday, could secure a pass to the Africa Cup of Nations last eight with one throw of the Group D dice still to roll.
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A quaterfinal ticket will go to the winners if the other game in the Rustenburg double-header between Algeria and Togo ends in a draw.
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Ivory Coast and Tunisia occupy the top places in the group on the strength of fortunate wins in their opening games.
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The Ivorians failed to do justice to their status as 2013 favourites when putting in an error-strewn performance on Monday.
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Tunisia, meanwhile, have history on their side as they prevailed 3-1 in the sides' only previous Nations Cup meeting in Port Elizabeth in 1996.