8 centre-backs Manchester City have signed to partner Vincent Kompany in recent years

5) Martin Demichelis

The World Cup 2014 finalist failed to make the most of his chances

Martin Demichelis signed for Manchester City from Atletico Madrid for a reported fee of £4.2 million. He was keen to join Pellegrini, who he had played under at Malaga. The experienced Argentine had a brilliant first season, winning the Premier League and the League Cup. However, the following seasons were less fruitful for Demichelis, who lacked pace and tackling ability.

It was further impossible for Demichelis who found first-team action hard to come by due to the signings of Nicolas Otamendi and Eliaquim Mangala. With Pep Guardiola no longer wanting him at City, the Argentine has signed for Espanyol.