Manchester City midfielder Samir Nasri hailed Sergio Aguero's hat-trick performance in victory over Champions League opponents Bayern Munich.
Manager Manuel Pellegrini believes he is a potential future Ballon d'Or winner as world player of the year and midfielder Nasri has no doubt he belongs in elite company.
The Frenchman said: "I don't think I need to speak about his performance - the statistics speak for themselves. He is a great player on his day. He is unstoppable. Last night we needed him and he delivered.
"At the moment he is one of best players in the world. Apart from Cristiano Ronaldo, who is on another planet, he is up there with (Lionel) Messi and (Luis) Suarez.
"He has been unbelievable this year. He was last year as well, the only problem was his injury.
"This year he has been more fit and when he is one on one with the keeper it doesn't seem like he will miss the target. He always makes the difference and always delivers for us in difficult moments."
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