The England international argued it is the competition for places at one of the world's richest clubs which is bringing out the best in players like Sergio Aguero.
Milner told talkSPORT: "He [Aguero] is unbelievable. This season he has been brilliant for us. He seems to have gone up another level. He has been absolutely outstanding. But we have got world class players all over the field. It was a great team performance [on Sunday].
"It was great for Jesus Navas to get on the scoresheet a couple of times and he is going to be a great player for us. Negredo has been amazing since he has come, he brings so much to the team. We've got so much competition for places up there."
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