Chelsea appear with a high confidence, this will be very difficult for FC Porto to be able to develop its game. If in the match against Juventus, Porto was quite convincing in the 2nd leg vs Juventus, this time they had to really face a serious opponent.
Tuche has done a great work in his short time at Chelsea you could see the level of confidence in the team, 14 games unbeaten with 9 clean sheets says a lot about this team. This is going to be an exciting fixture as both are on the same level this season, they are the two underdogs in the competition right now.
Chelsea plays from the hardest league and at the moment had played a decent football with good wins, FC Porto on the other hand is finding difficult to have a consistent winning in their native league, Chelsea isn't an underdog and so they couls have the opportunity to qualify in this stage.