Argentinian defender Otamendi is valued at £25million. City scout Rob Newman watched the 25-year-old in Porto’s 3-1 win against Sporting Lisbon last Sunday.
Otamendi is also being watched by Chelsea and Manchester United.
French youngster Mangala is rated at £40million and is being strongly linked with the likes of United, City and Chelsea.
Porto are keen on signing United midfielder Anderson on a loan deal in January.
The Daily Star reports that Porto are interested in any deal involving Anderson.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.