The Eagles of Carthage previously won the AFCON in 2004 and kick off their campaign for a second continental crown against Group E minnows this afternoon.
Two years ago, Tunisia conquered Nigeria after a poor group stage only to lose to Burkina Faso, so consistency is certainly an issue.
Namibia, meanwhile, have proven difficult to beat under the stewardship of former Hamburg defender Collin Benjamin and held Ghana to a draw in a pre-tournament friendly.
Here’s everything you need to know about where to watch the game.
Where to watch Tunisia vs Namibia
TV channel: In the UK, today's game will be televised live on Sky Sports Main Event and Sky Sports Football. Coverage starts at 4:55pm GMT ahead of a 5pm kick-off.
Live stream: Subscribers can also catch the contest live online via the Sky Go app.
Live blog: You can follow all the action on matchday via Standard Sport’s live blog.