Adam Johnson came back to haunt Manchester City as the champions slipped to a third successive 1-0 Barclays Premier League defeat at Sunderland.
The England winger, who was considered surplus to requirements at the Etihad Stadium during the summer and was allowed to join the Black Cats in a £10million move, embarrassed former team-mate Joe Hart with a dipping 53rd-minute strike which beat him at the near post and clinched three precious points for his new employers.
However, the winner was not without controversy with the visitors adamant they should have been awarded a free-kick for a foul on Pablo Zabaleta during the build-up.
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