Mancini is keen to find a replacement for their striker whose move to Brazilian side Corinthians collapsed early this week. Despite this blow to the player the manager still expects Tevez leave this summer.
Mancini has also insisted that should Tevez remain at City, he would still like to sign Aguero. The Atletico striker has made it clear he would like to leave and that he is interested in a move to City.
The Italian believes signing Aguero would be a great addition to City and is keen to sign striker.
"Aguero is young and can start to score a lot. He will become a top striker. He is 23 and now is his time," he said.
"He is like Carlos Tevez and could play with Carlos, or Edin Dzeko or Mario Balotelli.
"He can play as first striker or second striker. He has good technique. After many years in a top club like Atletico Madrid he can play Premier League.
"Aguero is a good player, like Samir Nasri, like Cesc Fabregas, like Robin van Persie - there are a lot of good players in England."
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