What must Chelsea and Barcelona do to qualify for the Champions League?

The UEFA Champions League action is back after weeks of International break. Some teams are looking forward to securing their qualification to the next round. 

Barcelona are in a very tough position having accumulated just six points in a possible 12. With just six points available and a match against group leader Bayern Munich. Failure to get a win against Benfica tonight will make it impossible for them to proceed to the next round.

Chelsea on the other hand are chasing the top position going into the next round. The Blues will be playing against group leader Juventus whom they lost to in the first leg. Should they get a win tonight, they will secure their qualification to the next round and have a chance of topping the group. 

With just a game to go in the group stage, tonight results will either make or mar this teams, especially Barcelona.