This was the preview before the match: 
labelled as 'clash-of-styles' and so something like a repeat of the Algeria game for Cameroon.  
On one side monstrous individuals, strong in technique, physis, and confidence. They are playing at clubs with most prominent names all over Europe, among them Liverpool or Real Madrid.  
On the other side a teamwork unit for which this competition really is the great thing, 19 of 22 players are Africa based: they all play at Tunisia. 
Cameroon looked so strong in the matches played, but they only once managed to maintain the pressure for 90 minutes on their opponents: when they beat the Côte d'Ivoire 3:0. In the period when they play at their limits they are hard to beat, they dominate the match with a clear superiority in one against one challenges. But here lies a possible problem factor: Cameroon has been critisized for rough and sometimes late tackling and at a World Cup they probably would not have finished the Algeria match with 11 men. This public discussion will be in the heads of all 22 players and the referee, so it could become a possible factor and Cameroon might have to face a red card in this match. The tactically smart Tunisians will try to find measures against the physical style, possible injuries or intimidation. Expect them to play a lot one against one targeting yellow carded players, falling with cries, etc. 
Tunisia has been the subject of klischees after the quarter finals against Egypt. In this match they played very defensive, like in the old Kasperczak (coach 1994-1998) era. And they have an Italian coach who immediately got labelled the catenaccio tag after the match. This underrates the Tunisian flexibility completely. It was Scoglio (the new coach) who had abandoned the defensive style for a modern midfield pressure approach first, working with offside etc.. But this had failed resultwise against Nigeria. Nevertheless they played quite open in the second half of the Morocco match and invited the opposite side for a lot of counter attacks. Like also Congo had in the third match. 
But playing against the Egypts this tactics would have meant suicide. If Egypt once had taken the lead they would have been almost impossible to beat. So the smart Tunisians did was was necessary: sut out the opponent and score by a standard. 
The Tunisians can adapt a lot of tactical ideas, so if Cameroon really expects to face the same Tunisian look as in the Egypt game they will experience a surprise. 
The biggest problem for Tunisia: their commitment. Sometimes it looks as if the greatness of meaning of the matches puts a heavy load on them, especially in finishing. Against Congo they were not able to score the crucial second goal, not even by a penalty. Probably none of the 11 players on the field would have managed this across the line. The Cameroon match might be a bit easier: They are outsiders and should have no fear of failure. 
Favorites: Cameroon 
> reports on the matches played before 

halftime 0:0 
most of the time a completely open match with both teams looking for the score and with some opportunities to do so. Only in the closing minutes Cameroon had some advantage. 

final result  3:0 
Cameroon looked strong but not unbeatable. But to achieve the surprise Tunisia would have needed a first half goal. Here their finishing problems came into account. Torwards the end a possible fitness gap became apparent.  
The feared problems with refereeing concerning the Camerron style of tackling never played a role, as the match was fair and well conducted by the Arabian referee.  
The goal short after the half clearly did not harm the Cameroon confidence, too. They will be an exciting opponent for Nigeria in the finals on Sunday.