Cissokho was only at Porto for half a year and he's been effectively replaced by Alvaro Pereira. They signed Falcao to replace Lisandro and he already has a much better goalscoring record than Lisandro had. I'd agree about their midfield though, Belluschi hasn't settled in yet an Lucho was a very important player. Still, Porto are no pushovers, it's smart to underestimate them, especially when we can't count on Drogba.