Hell No. Why should we take other club's trash? Sissoko wasn't a flop @ Liverpool; he simply had better players ahead of him in the form of Xabi Alonso and Mascherano. Hence, he lost his place.
I always thought Sissoko was a very good player. As for Dossena, he isn't even in the Italian national team fold, behind Grosso


in the pecking order. If he can't even displace Grosso, then why bother acquiring him to be our starter?