#10. Nicolas Otamendi – Manchester City
The Argentine defender signed for Manchester City from Valencia for a fee worth £28.5 million in the summer of 2015 and has so far failed to impress. Otamendi proved last season in La Liga what an outstanding defender he can be but has not come anywhere near to that level this time around. The Argentine is the experienced half of the most expensive centre back pairing ever assembled and seems to lack positional sense and concentration at the back. Maybe Otamendi was just on exceptionally good form last season and this is his true level but regardless of that, a £28.5 million player should perform at a much higher level.