Toure, who played for Barcelona from 2007-10, still retains hope City can progress, although he admits it will be tough for his current side to progress, and he will not celebrate if he scores.
Yaya Toure: "I never celebrate a goal in the Nou Camp.
"We have a very complicated (situation) in the Champions League against Barcelona. To me, it will also be very difficult to play at the Camp Nou.
"When I left the club, my ambition was to keep winning titles and I'm achieving this goal.
"The Capital One Cup was very nice, but the Copa del Rey (with Barcelona was good) too.
"Carles Puyol is a great person, very important for the club and has an amazing mind.
"I do not know if I will end my career at Manchester City. We'll see how it goes."