Had a similar discussion with my mate the other day- It seems to me as if the only reason Yaya got away with playing defensive midfield wiv barca was bcoz it was barca, no other reason- for such a big man I am shocked at how poor he is in the air (he really is), players can also take him on quite easily- I think Mancini realised that the man cannot defend. He's a quality play maker with perfect passing and bursting powerful runs. Slightly annoys me wen he seems as if hes limping and slightly struggling as he tries to make his way back, but as soon as we've got an attack or hes wiv the ball hes miraculously perfect! Yaya is a great player but i dnt think he can defend- it is clear to me that he doesnt do the dirty work and would therefore not be suited to CB. Lescott is a worry and a shaky buy which seemed to be based on a 'good season with Everton' which i believe he wa recognised for his goal scoring rather than his defending. At the moment he looks ok, but if we want to be the best he isnt good enough- His footballing capabilites are a little shakey as he seems cumbersome on the ball, aslo tentative wen under pressure and lacks pace. Whilst we are the positive team who constantly puts the opposition under pressure it is ok but wen the boots on the other foot against tricky fast paced teams (Europe especially- United, Chelsea, once Arsenal, Poss Liverpool with Suarez) i do worry for him. I do hope i'm wrong, but i believe Kompany's partner is the missing link.