Arsenal v Napoli
I don't see Napoli as potential Champions League winners this season, but they'll be a threat to whoever they play against.
They have been a good team for several years, they have a manger who knows what he's doing and they've strengthened over the summer. They're unbeaten in Serie A this season, which tells its own story.
I know they lost Edison Cavani, but they've brought in the likes of Jose Reina and Gonzalo Higuain, who is a fabulous player. I really like him.
I saw him come on as a substitute against Bournemouth in a pre-season friendly and he's got an angry head; he does not like losing. He came on when they were 3-0 up just after half-time and was falling out with his own team-mates because they weren't passing the ball to him and a few of them were in "Hollywood" mode. I like that. I'm a fan.
Rafael Benitez knows what he's doing in this competition. He's an experienced manager at the highest level and there'll be no surprises for him against Arsenal.
Arsenal have accomplished their first mission by winning in Marseille. I expect the French side to be the whipping boys of this group and they need to beat them home and away.
On top of that, they need to win at least one of their home games against Napoli and Dortmund if they are to get to the knockout phase.
Right now Aaron Ramsey is the star of the show for them. A few weeks ago at the Tottenham game I said that he looked the complete midfielder, except he doesn't get enough goals. Now he's addressed that and has become a goalscoring midfielder.
I played with a guy who got 25 goals every season from central midfield in Terry McDermott and Ramsey should be scoring goals if he wants to call himself an attacking midfielder. They haven't got a world centre-forward, so the midfielders have to chip in with goals, it's as simple as that.
Overall we'll know a lot more about Arsenal after this game. They are on a fabulous run, but this will be a really stiff test for them.
Steaua v Chelsea
If I'm being brutally honest, I thought Basel were fabulous at Stamford Bridge two weeks ago.
On the night, the result wasn't a major surprise for anybody other than Chelsea supporters because the Swiss side played really well. I think you have to give them some credit because they were fabulous.
I still think Chelsea will get out of the group and you've got to think they can go to Romania on Tuesday night and get three points.
Fernando Torres looked really sharp on Saturday and had a really good game against Tottenham, other than his incident with Jan Vertonghen. Other than that it was more like the old Torres that we saw against Liverpool.
He is suspended for their next league game so that may come into Jose Mourinho's thinking ahead of this match. Samuel Eto'o needs to get himself fully up to speed and I can see them keeping the Spaniard in the team.
Also, it seems Mourinho had his own thoughts about Juan Mata, but has perhaps had a change of heart. I was at Chelsea's first game against Hull and he seemed to have opted for a different combination.
But Mata has proved to be a fabulous player in English football and you'd say he would start in almost any other Premier League team. There was something in him that Jose had a doubt about but that might have changed and maybe Jose is thinking that he might be in the first XI.
I think Chelsea are going to be ok, despite that opening defeat.
Celtic v Barcelona
Barcelona may have set a club record for their best ever start to a La Liga season, but I'm still not convinced by them.
There's still a concern for me at the back - Marc Batra and Gerard Pique are still vulnerable in my opinion. I think they're both very good with the ball, but I don't think they're great defenders.
And the injury to Lionel Messi is enormous; we saw that last year when they played Bayern Munich without him. He is their number one threat.
If he keeps getting muscle injuries then we'll find out in this coming season how vital he is to Barcelona because he's such a special player for them. In the tight games he's the one who makes the difference. People say he's the best player ever - but that's a debate for another day.
Nevertheless, Celtic are going to spend the vast majority of this game without the ball and will be relying on getting something from a set piece or a counter-attack.
Personally, I think Barcelona will have learned from this fixture last season when they were caught out by a corner and Tony Watt's goal on the break.