Mané scored from the spot after Aymen Abdennour had brought down Cheikhou Kouyaté in the penalty area, giving Senegal the lead against the run of play.
Centre-half Kara Mbodji added the second on the half-hour, heading in from a corner as Senegal became the first team to register a win at the tournament after the first three matches all ended in draws. However, the victory was far from convincing as Tunisia missed several chances, notably in a dominant second-half performance.
In the earlier match, Leicester City’s Riyad Mahrez scored twice, one a late equaliser, as Algeria were held to a 2-2 draw by Zimbabwe.
Defending champions Ivory Coast begin their campaign in Group C against Togo on Monday, while in the same group, Democratic Republic of Congo face Morocco.
guardian.co.uk © Guardian News and Media Limited 2010
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