Manchester City boss Manuel Pellegrini has given an updated review of this season's signings.
Pellegrini, however, admits Eliaquim Mangala could be doing better.
"Bacary Sagna has maybe not played a lot, but the times he's played he's done very well and we have another choice at full-back.
"We never had that option with Micah Richards because he was always injured.
"Javi Garcia wanted to go. We changed him for Fernando. He's had a normal performance.
"Maybe you can have some criticisms of Mangala - but he's improving and he'll be an important player for this club in the future."